diff --git a/java/com/google/gerrit/plugins/codeowners/acceptance/AbstractCodeOwnersIT.java b/java/com/google/gerrit/plugins/codeowners/acceptance/AbstractCodeOwnersIT.java
index ec40999..0b50f6e 100644
--- a/java/com/google/gerrit/plugins/codeowners/acceptance/AbstractCodeOwnersIT.java
+++ b/java/com/google/gerrit/plugins/codeowners/acceptance/AbstractCodeOwnersIT.java
@@ -23,7 +23,7 @@
 import com.google.gerrit.plugins.codeowners.api.impl.CodeOwnersFactory;
 import com.google.gerrit.plugins.codeowners.api.impl.ProjectCodeOwnersFactory;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerBackendId;
-import com.google.gerrit.plugins.codeowners.config.BackendConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.BackendConfig;
 import com.google.gerrit.testing.ConfigSuite;
 import java.util.Arrays;
 import org.eclipse.jgit.lib.Config;
diff --git a/java/com/google/gerrit/plugins/codeowners/acceptance/AbstractCodeOwnersTest.java b/java/com/google/gerrit/plugins/codeowners/acceptance/AbstractCodeOwnersTest.java
index 3580969..3d7c628 100644
--- a/java/com/google/gerrit/plugins/codeowners/acceptance/AbstractCodeOwnersTest.java
+++ b/java/com/google/gerrit/plugins/codeowners/acceptance/AbstractCodeOwnersTest.java
@@ -36,8 +36,8 @@
 import com.google.gerrit.extensions.restapi.RestApiException;
 import com.google.gerrit.plugins.codeowners.acceptance.testsuite.CodeOwnerConfigOperations;
 import com.google.gerrit.plugins.codeowners.acceptance.testsuite.TestCodeOwnerConfigCreation.Builder;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
-import com.google.gerrit.plugins.codeowners.config.StatusConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.StatusConfig;
 import com.google.gerrit.plugins.codeowners.util.JgitPath;
 import com.google.inject.Inject;
 import java.nio.file.Path;
diff --git a/java/com/google/gerrit/plugins/codeowners/acceptance/testsuite/CodeOwnerConfigOperationsImpl.java b/java/com/google/gerrit/plugins/codeowners/acceptance/testsuite/CodeOwnerConfigOperationsImpl.java
index 317098d..5fe97c9 100644
--- a/java/com/google/gerrit/plugins/codeowners/acceptance/testsuite/CodeOwnerConfigOperationsImpl.java
+++ b/java/com/google/gerrit/plugins/codeowners/acceptance/testsuite/CodeOwnerConfigOperationsImpl.java
@@ -22,7 +22,7 @@
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerSetModification;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwners;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnersUpdate;
-import com.google.gerrit.plugins.codeowners.config.BackendConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.BackendConfig;
 import com.google.gerrit.plugins.codeowners.util.JgitPath;
 import com.google.gerrit.server.ServerInitiated;
 import com.google.gerrit.server.git.GitRepositoryManager;
diff --git a/java/com/google/gerrit/plugins/codeowners/acceptance/testsuite/TestPathExpressions.java b/java/com/google/gerrit/plugins/codeowners/acceptance/testsuite/TestPathExpressions.java
index b0ebb67..91867cb 100644
--- a/java/com/google/gerrit/plugins/codeowners/acceptance/testsuite/TestPathExpressions.java
+++ b/java/com/google/gerrit/plugins/codeowners/acceptance/testsuite/TestPathExpressions.java
@@ -19,7 +19,7 @@
 import com.google.gerrit.plugins.codeowners.backend.GlobMatcher;
 import com.google.gerrit.plugins.codeowners.backend.PathExpressionMatcher;
 import com.google.gerrit.plugins.codeowners.backend.SimplePathExpressionMatcher;
-import com.google.gerrit.plugins.codeowners.config.BackendConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.BackendConfig;
 import com.google.inject.Inject;
 
 /**
diff --git a/java/com/google/gerrit/plugins/codeowners/backend/AbstractFileBasedCodeOwnerBackend.java b/java/com/google/gerrit/plugins/codeowners/backend/AbstractFileBasedCodeOwnerBackend.java
index 1de1325..f392696 100644
--- a/java/com/google/gerrit/plugins/codeowners/backend/AbstractFileBasedCodeOwnerBackend.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/AbstractFileBasedCodeOwnerBackend.java
@@ -21,7 +21,7 @@
 import com.google.gerrit.common.Nullable;
 import com.google.gerrit.entities.Project;
 import com.google.gerrit.exceptions.StorageException;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.server.GerritPersonIdent;
 import com.google.gerrit.server.IdentifiedUser;
 import com.google.gerrit.server.git.GitRepositoryManager;
diff --git a/java/com/google/gerrit/plugins/codeowners/backend/ChangedFiles.java b/java/com/google/gerrit/plugins/codeowners/backend/ChangedFiles.java
index 1b836fe..78956a2 100644
--- a/java/com/google/gerrit/plugins/codeowners/backend/ChangedFiles.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/ChangedFiles.java
@@ -23,9 +23,9 @@
 import com.google.gerrit.entities.Patch;
 import com.google.gerrit.entities.Project;
 import com.google.gerrit.extensions.client.DiffPreferencesInfo.Whitespace;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.plugins.codeowners.common.ChangedFile;
 import com.google.gerrit.plugins.codeowners.common.MergeCommitStrategy;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.server.change.RevisionResource;
 import com.google.gerrit.server.git.GitRepositoryManager;
 import com.google.gerrit.server.patch.PatchListCache;
diff --git a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheck.java b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheck.java
index 0a1f837..69d6dea 100644
--- a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheck.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheck.java
@@ -28,10 +28,10 @@
 import com.google.gerrit.entities.Project;
 import com.google.gerrit.exceptions.StorageException;
 import com.google.gerrit.extensions.restapi.ResourceConflictException;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.RequiredApproval;
 import com.google.gerrit.plugins.codeowners.common.ChangedFile;
 import com.google.gerrit.plugins.codeowners.common.CodeOwnerStatus;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
-import com.google.gerrit.plugins.codeowners.config.RequiredApproval;
 import com.google.gerrit.server.ApprovalsUtil;
 import com.google.gerrit.server.git.GitRepositoryManager;
 import com.google.gerrit.server.logging.Metadata;
diff --git a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerConfigFileUpdateScanner.java b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerConfigFileUpdateScanner.java
index 6222b7d..aa11eb8 100644
--- a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerConfigFileUpdateScanner.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerConfigFileUpdateScanner.java
@@ -21,7 +21,7 @@
 import com.google.gerrit.entities.BranchNameKey;
 import com.google.gerrit.exceptions.StorageException;
 import com.google.gerrit.git.RefUpdateUtil;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.server.GerritPersonIdent;
 import com.google.gerrit.server.IdentifiedUser;
 import com.google.gerrit.server.git.GitRepositoryManager;
diff --git a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerConfigScanner.java b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerConfigScanner.java
index c8c96ab..1aa38e6 100644
--- a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerConfigScanner.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerConfigScanner.java
@@ -22,7 +22,7 @@
 import com.google.gerrit.entities.BranchNameKey;
 import com.google.gerrit.entities.RefNames;
 import com.google.gerrit.exceptions.StorageException;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.server.git.GitRepositoryManager;
 import com.google.inject.Inject;
 import java.io.IOException;
diff --git a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerResolver.java b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerResolver.java
index 8e1d906..2fb7607 100644
--- a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerResolver.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerResolver.java
@@ -25,7 +25,7 @@
 import com.google.gerrit.entities.Account;
 import com.google.gerrit.entities.Project;
 import com.google.gerrit.exceptions.StorageException;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.IdentifiedUser;
 import com.google.gerrit.server.account.AccountCache;
diff --git a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerSubmitRule.java b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerSubmitRule.java
index 0599cf6..6cf8ef3 100644
--- a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerSubmitRule.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerSubmitRule.java
@@ -23,7 +23,7 @@
 import com.google.gerrit.extensions.annotations.Exports;
 import com.google.gerrit.extensions.restapi.ResourceConflictException;
 import com.google.gerrit.extensions.restapi.RestApiException;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.server.logging.Metadata;
 import com.google.gerrit.server.logging.TraceContext;
 import com.google.gerrit.server.logging.TraceContext.TraceTimer;
diff --git a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwners.java b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwners.java
index 2165fda..843a054 100644
--- a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwners.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwners.java
@@ -17,7 +17,7 @@
 import static java.util.Objects.requireNonNull;
 
 import com.google.common.base.Throwables;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
 import java.nio.file.Path;
diff --git a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnersExceptionHook.java b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnersExceptionHook.java
index b4e2931..abfc9f5 100644
--- a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnersExceptionHook.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnersExceptionHook.java
@@ -17,7 +17,7 @@
 import com.google.common.base.Throwables;
 import com.google.common.collect.ImmutableList;
 import com.google.gerrit.common.Nullable;
-import com.google.gerrit.plugins.codeowners.config.InvalidPluginConfigurationException;
+import com.google.gerrit.plugins.codeowners.backend.config.InvalidPluginConfigurationException;
 import com.google.gerrit.server.ExceptionHook;
 import java.util.Optional;
 
diff --git a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnersOnPostReview.java b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnersOnPostReview.java
index 8f07807..c018d61 100644
--- a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnersOnPostReview.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnersOnPostReview.java
@@ -23,9 +23,9 @@
 import com.google.gerrit.entities.Account;
 import com.google.gerrit.entities.PatchSet;
 import com.google.gerrit.extensions.restapi.ResourceConflictException;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.RequiredApproval;
 import com.google.gerrit.plugins.codeowners.common.CodeOwnerStatus;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
-import com.google.gerrit.plugins.codeowners.config.RequiredApproval;
 import com.google.gerrit.plugins.codeowners.util.JgitPath;
 import com.google.gerrit.server.IdentifiedUser;
 import com.google.gerrit.server.notedb.ChangeNotes;
diff --git a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnersUpdate.java b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnersUpdate.java
index e123b84..d2a7f01 100644
--- a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnersUpdate.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnersUpdate.java
@@ -14,7 +14,7 @@
 
 package com.google.gerrit.plugins.codeowners.backend;
 
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.server.IdentifiedUser;
 import com.google.inject.assistedinject.Assisted;
 import com.google.inject.assistedinject.AssistedInject;
diff --git a/java/com/google/gerrit/plugins/codeowners/backend/PathCodeOwners.java b/java/com/google/gerrit/plugins/codeowners/backend/PathCodeOwners.java
index ae14883..f787dc8 100644
--- a/java/com/google/gerrit/plugins/codeowners/backend/PathCodeOwners.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/PathCodeOwners.java
@@ -24,7 +24,7 @@
 import com.google.common.flogger.FluentLogger;
 import com.google.gerrit.entities.BranchNameKey;
 import com.google.gerrit.entities.Project;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.server.logging.Metadata;
 import com.google.gerrit.server.logging.TraceContext;
 import com.google.gerrit.server.logging.TraceContext.TraceTimer;
diff --git a/java/com/google/gerrit/plugins/codeowners/backend/UnresolvedImport.java b/java/com/google/gerrit/plugins/codeowners/backend/UnresolvedImport.java
index f2491b7..4d1b975 100644
--- a/java/com/google/gerrit/plugins/codeowners/backend/UnresolvedImport.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/UnresolvedImport.java
@@ -16,7 +16,7 @@
 
 import com.google.auto.value.AutoValue;
 import com.google.common.base.MoreObjects;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 
 /** Information about an unresolved import. */
 @AutoValue
diff --git a/java/com/google/gerrit/plugins/codeowners/config/AbstractRequiredApprovalConfig.java b/java/com/google/gerrit/plugins/codeowners/backend/config/AbstractRequiredApprovalConfig.java
similarity index 96%
rename from java/com/google/gerrit/plugins/codeowners/config/AbstractRequiredApprovalConfig.java
rename to java/com/google/gerrit/plugins/codeowners/backend/config/AbstractRequiredApprovalConfig.java
index 260d9d9..01d381b 100644
--- a/java/com/google/gerrit/plugins/codeowners/config/AbstractRequiredApprovalConfig.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/config/AbstractRequiredApprovalConfig.java
@@ -12,9 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
-import static com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration.SECTION_CODE_OWNERS;
+import static com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration.SECTION_CODE_OWNERS;
 import static java.util.Objects.requireNonNull;
 
 import com.google.common.collect.ImmutableList;
diff --git a/java/com/google/gerrit/plugins/codeowners/config/BackendConfig.java b/java/com/google/gerrit/plugins/codeowners/backend/config/BackendConfig.java
similarity index 97%
rename from java/com/google/gerrit/plugins/codeowners/config/BackendConfig.java
rename to java/com/google/gerrit/plugins/codeowners/backend/config/BackendConfig.java
index a820739..9f163ce 100644
--- a/java/com/google/gerrit/plugins/codeowners/config/BackendConfig.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/config/BackendConfig.java
@@ -12,9 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
-import static com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration.SECTION_CODE_OWNERS;
+import static com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration.SECTION_CODE_OWNERS;
 import static java.util.Objects.requireNonNull;
 
 import com.google.common.annotations.VisibleForTesting;
diff --git a/java/com/google/gerrit/plugins/codeowners/config/CodeOwnersPluginConfigValidator.java b/java/com/google/gerrit/plugins/codeowners/backend/config/CodeOwnersPluginConfigValidator.java
similarity index 99%
rename from java/com/google/gerrit/plugins/codeowners/config/CodeOwnersPluginConfigValidator.java
rename to java/com/google/gerrit/plugins/codeowners/backend/config/CodeOwnersPluginConfigValidator.java
index bddfdc9..28e7a8d 100644
--- a/java/com/google/gerrit/plugins/codeowners/config/CodeOwnersPluginConfigValidator.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/config/CodeOwnersPluginConfigValidator.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
 import com.google.common.collect.ImmutableList;
 import com.google.common.flogger.FluentLogger;
diff --git a/java/com/google/gerrit/plugins/codeowners/config/CodeOwnersPluginConfiguration.java b/java/com/google/gerrit/plugins/codeowners/backend/config/CodeOwnersPluginConfiguration.java
similarity index 99%
rename from java/com/google/gerrit/plugins/codeowners/config/CodeOwnersPluginConfiguration.java
rename to java/com/google/gerrit/plugins/codeowners/backend/config/CodeOwnersPluginConfiguration.java
index fe18fb8..a440235 100644
--- a/java/com/google/gerrit/plugins/codeowners/config/CodeOwnersPluginConfiguration.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/config/CodeOwnersPluginConfiguration.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
 import static com.google.gerrit.server.project.ProjectCache.illegalState;
 import static java.util.Objects.requireNonNull;
diff --git a/java/com/google/gerrit/plugins/codeowners/config/ConfigModule.java b/java/com/google/gerrit/plugins/codeowners/backend/config/ConfigModule.java
similarity index 94%
rename from java/com/google/gerrit/plugins/codeowners/config/ConfigModule.java
rename to java/com/google/gerrit/plugins/codeowners/backend/config/ConfigModule.java
index ec439ad..5d8522b 100644
--- a/java/com/google/gerrit/plugins/codeowners/config/ConfigModule.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/config/ConfigModule.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
 import com.google.gerrit.extensions.registration.DynamicSet;
 import com.google.gerrit.server.git.validators.CommitValidationListener;
diff --git a/java/com/google/gerrit/plugins/codeowners/config/GeneralConfig.java b/java/com/google/gerrit/plugins/codeowners/backend/config/GeneralConfig.java
similarity index 98%
rename from java/com/google/gerrit/plugins/codeowners/config/GeneralConfig.java
rename to java/com/google/gerrit/plugins/codeowners/backend/config/GeneralConfig.java
index cdd17ad..5d7062b 100644
--- a/java/com/google/gerrit/plugins/codeowners/config/GeneralConfig.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/config/GeneralConfig.java
@@ -12,10 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
 import static com.google.common.collect.ImmutableSet.toImmutableSet;
-import static com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration.SECTION_CODE_OWNERS;
+import static com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration.SECTION_CODE_OWNERS;
 import static java.util.Objects.requireNonNull;
 
 import com.google.common.annotations.VisibleForTesting;
diff --git a/java/com/google/gerrit/plugins/codeowners/config/InvalidPluginConfigurationException.java b/java/com/google/gerrit/plugins/codeowners/backend/config/InvalidPluginConfigurationException.java
similarity index 94%
rename from java/com/google/gerrit/plugins/codeowners/config/InvalidPluginConfigurationException.java
rename to java/com/google/gerrit/plugins/codeowners/backend/config/InvalidPluginConfigurationException.java
index dd78ada..d80b7cf 100644
--- a/java/com/google/gerrit/plugins/codeowners/config/InvalidPluginConfigurationException.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/config/InvalidPluginConfigurationException.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
 /**
  * Exception that is thrown if a configuration parameter of the code-owners plugin has an invalid
diff --git a/java/com/google/gerrit/plugins/codeowners/config/OverrideApprovalConfig.java b/java/com/google/gerrit/plugins/codeowners/backend/config/OverrideApprovalConfig.java
similarity index 96%
rename from java/com/google/gerrit/plugins/codeowners/config/OverrideApprovalConfig.java
rename to java/com/google/gerrit/plugins/codeowners/backend/config/OverrideApprovalConfig.java
index 3b4f56c..2a815a8 100644
--- a/java/com/google/gerrit/plugins/codeowners/config/OverrideApprovalConfig.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/config/OverrideApprovalConfig.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
 import com.google.common.annotations.VisibleForTesting;
 import com.google.gerrit.extensions.annotations.PluginName;
diff --git a/java/com/google/gerrit/plugins/codeowners/config/RequiredApproval.java b/java/com/google/gerrit/plugins/codeowners/backend/config/RequiredApproval.java
similarity index 98%
rename from java/com/google/gerrit/plugins/codeowners/config/RequiredApproval.java
rename to java/com/google/gerrit/plugins/codeowners/backend/config/RequiredApproval.java
index e361ea6..f71df6a 100644
--- a/java/com/google/gerrit/plugins/codeowners/config/RequiredApproval.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/config/RequiredApproval.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
 import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Preconditions.checkState;
diff --git a/java/com/google/gerrit/plugins/codeowners/config/RequiredApprovalConfig.java b/java/com/google/gerrit/plugins/codeowners/backend/config/RequiredApprovalConfig.java
similarity index 94%
rename from java/com/google/gerrit/plugins/codeowners/config/RequiredApprovalConfig.java
rename to java/com/google/gerrit/plugins/codeowners/backend/config/RequiredApprovalConfig.java
index e49904d..3902655 100644
--- a/java/com/google/gerrit/plugins/codeowners/config/RequiredApprovalConfig.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/config/RequiredApprovalConfig.java
@@ -12,9 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
-import static com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration.SECTION_CODE_OWNERS;
+import static com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration.SECTION_CODE_OWNERS;
 
 import com.google.common.annotations.VisibleForTesting;
 import com.google.gerrit.extensions.annotations.PluginName;
diff --git a/java/com/google/gerrit/plugins/codeowners/config/StatusConfig.java b/java/com/google/gerrit/plugins/codeowners/backend/config/StatusConfig.java
similarity index 97%
rename from java/com/google/gerrit/plugins/codeowners/config/StatusConfig.java
rename to java/com/google/gerrit/plugins/codeowners/backend/config/StatusConfig.java
index 4648271..bdc6e2f 100644
--- a/java/com/google/gerrit/plugins/codeowners/config/StatusConfig.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/config/StatusConfig.java
@@ -12,9 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
-import static com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration.SECTION_CODE_OWNERS;
+import static com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration.SECTION_CODE_OWNERS;
 import static java.util.Objects.requireNonNull;
 
 import com.google.common.annotations.VisibleForTesting;
diff --git a/java/com/google/gerrit/plugins/codeowners/backend/findowners/FindOwnersBackend.java b/java/com/google/gerrit/plugins/codeowners/backend/findowners/FindOwnersBackend.java
index 15b4385..257c1d4 100644
--- a/java/com/google/gerrit/plugins/codeowners/backend/findowners/FindOwnersBackend.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/findowners/FindOwnersBackend.java
@@ -19,7 +19,7 @@
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfig;
 import com.google.gerrit.plugins.codeowners.backend.FindOwnersGlobMatcher;
 import com.google.gerrit.plugins.codeowners.backend.PathExpressionMatcher;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.server.GerritPersonIdent;
 import com.google.gerrit.server.git.GitRepositoryManager;
 import com.google.gerrit.server.git.meta.MetaDataUpdate;
diff --git a/java/com/google/gerrit/plugins/codeowners/backend/proto/ProtoBackend.java b/java/com/google/gerrit/plugins/codeowners/backend/proto/ProtoBackend.java
index e671c6f..e8e0694 100644
--- a/java/com/google/gerrit/plugins/codeowners/backend/proto/ProtoBackend.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/proto/ProtoBackend.java
@@ -19,7 +19,7 @@
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfig;
 import com.google.gerrit.plugins.codeowners.backend.PathExpressionMatcher;
 import com.google.gerrit.plugins.codeowners.backend.SimplePathExpressionMatcher;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.server.GerritPersonIdent;
 import com.google.gerrit.server.git.GitRepositoryManager;
 import com.google.gerrit.server.git.meta.MetaDataUpdate;
diff --git a/java/com/google/gerrit/plugins/codeowners/module/Module.java b/java/com/google/gerrit/plugins/codeowners/module/Module.java
index 1c362f4..c5447f6 100644
--- a/java/com/google/gerrit/plugins/codeowners/module/Module.java
+++ b/java/com/google/gerrit/plugins/codeowners/module/Module.java
@@ -17,7 +17,7 @@
 import com.google.gerrit.extensions.config.FactoryModule;
 import com.google.gerrit.plugins.codeowners.api.impl.ApiModule;
 import com.google.gerrit.plugins.codeowners.backend.BackendModule;
-import com.google.gerrit.plugins.codeowners.config.ConfigModule;
+import com.google.gerrit.plugins.codeowners.backend.config.ConfigModule;
 import com.google.gerrit.plugins.codeowners.restapi.RestApiModule;
 import com.google.gerrit.plugins.codeowners.validation.ValidationModule;
 
diff --git a/java/com/google/gerrit/plugins/codeowners/restapi/AbstractGetCodeOwnersForPath.java b/java/com/google/gerrit/plugins/codeowners/restapi/AbstractGetCodeOwnersForPath.java
index c77cb1d..71cb59f 100644
--- a/java/com/google/gerrit/plugins/codeowners/restapi/AbstractGetCodeOwnersForPath.java
+++ b/java/com/google/gerrit/plugins/codeowners/restapi/AbstractGetCodeOwnersForPath.java
@@ -39,7 +39,7 @@
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerResolverResult;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerScore;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerScoring;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.server.account.AccountControl;
 import com.google.gerrit.server.account.AccountDirectory.FillOptions;
 import com.google.gerrit.server.account.AccountLoader;
diff --git a/java/com/google/gerrit/plugins/codeowners/restapi/CheckCodeOwner.java b/java/com/google/gerrit/plugins/codeowners/restapi/CheckCodeOwner.java
index a125d34..874400c 100644
--- a/java/com/google/gerrit/plugins/codeowners/restapi/CheckCodeOwner.java
+++ b/java/com/google/gerrit/plugins/codeowners/restapi/CheckCodeOwner.java
@@ -34,7 +34,7 @@
 import com.google.gerrit.plugins.codeowners.backend.OptionalResultWithMessages;
 import com.google.gerrit.plugins.codeowners.backend.PathCodeOwners;
 import com.google.gerrit.plugins.codeowners.backend.PathCodeOwnersResult;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.plugins.codeowners.util.JgitPath;
 import com.google.gerrit.server.IdentifiedUser;
 import com.google.gerrit.server.permissions.PermissionBackend;
diff --git a/java/com/google/gerrit/plugins/codeowners/restapi/CheckCodeOwnerConfigFiles.java b/java/com/google/gerrit/plugins/codeowners/restapi/CheckCodeOwnerConfigFiles.java
index 144f0e5..73ed96d 100644
--- a/java/com/google/gerrit/plugins/codeowners/restapi/CheckCodeOwnerConfigFiles.java
+++ b/java/com/google/gerrit/plugins/codeowners/restapi/CheckCodeOwnerConfigFiles.java
@@ -38,7 +38,7 @@
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerBackend;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfig;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfigScanner;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.plugins.codeowners.validation.CodeOwnerConfigValidator;
 import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.git.validators.CommitValidationMessage;
diff --git a/java/com/google/gerrit/plugins/codeowners/restapi/CheckCodeOwnerConfigFilesInRevision.java b/java/com/google/gerrit/plugins/codeowners/restapi/CheckCodeOwnerConfigFilesInRevision.java
index b3e2494..d960595 100644
--- a/java/com/google/gerrit/plugins/codeowners/restapi/CheckCodeOwnerConfigFilesInRevision.java
+++ b/java/com/google/gerrit/plugins/codeowners/restapi/CheckCodeOwnerConfigFilesInRevision.java
@@ -24,7 +24,7 @@
 import com.google.gerrit.plugins.codeowners.api.CheckCodeOwnerConfigFilesInRevisionInput;
 import com.google.gerrit.plugins.codeowners.backend.ChangedFiles;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerBackend;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.plugins.codeowners.validation.CodeOwnerConfigValidator;
 import com.google.gerrit.server.IdentifiedUser;
 import com.google.gerrit.server.change.RevisionResource;
diff --git a/java/com/google/gerrit/plugins/codeowners/restapi/CodeOwnerProjectConfigJson.java b/java/com/google/gerrit/plugins/codeowners/restapi/CodeOwnerProjectConfigJson.java
index bf3a8ad..d9f9a8b 100644
--- a/java/com/google/gerrit/plugins/codeowners/restapi/CodeOwnerProjectConfigJson.java
+++ b/java/com/google/gerrit/plugins/codeowners/restapi/CodeOwnerProjectConfigJson.java
@@ -34,8 +34,8 @@
 import com.google.gerrit.plugins.codeowners.api.RequiredApprovalInfo;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerBackendId;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfigScanner;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
-import com.google.gerrit.plugins.codeowners.config.RequiredApproval;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.RequiredApproval;
 import com.google.gerrit.server.permissions.PermissionBackendException;
 import com.google.gerrit.server.project.BranchResource;
 import com.google.gerrit.server.project.ProjectResource;
diff --git a/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnerConfigFiles.java b/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnerConfigFiles.java
index 9ec7118..ef08584 100644
--- a/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnerConfigFiles.java
+++ b/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnerConfigFiles.java
@@ -26,7 +26,7 @@
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerBackend;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfig;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfigScanner;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.server.project.BranchResource;
 import com.google.inject.Inject;
 import java.nio.file.Path;
diff --git a/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnerConfigForPathInBranch.java b/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnerConfigForPathInBranch.java
index 801537d..1347471 100644
--- a/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnerConfigForPathInBranch.java
+++ b/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnerConfigForPathInBranch.java
@@ -20,7 +20,7 @@
 import com.google.gerrit.plugins.codeowners.api.CodeOwnerConfigInfo;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfig;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwners;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.plugins.codeowners.restapi.CodeOwnerConfigsInBranchCollection.PathResource;
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
diff --git a/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnersForPathInBranch.java b/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnersForPathInBranch.java
index 3fab537..b1d3957 100644
--- a/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnersForPathInBranch.java
+++ b/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnersForPathInBranch.java
@@ -25,7 +25,7 @@
 import com.google.gerrit.plugins.codeowners.api.CodeOwnerInfo;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfigHierarchy;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerResolver;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.server.account.AccountControl;
 import com.google.gerrit.server.account.Accounts;
 import com.google.gerrit.server.change.IncludedInResolver;
diff --git a/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnersForPathInChange.java b/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnersForPathInChange.java
index c0465f3..0e6e2fa 100644
--- a/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnersForPathInChange.java
+++ b/java/com/google/gerrit/plugins/codeowners/restapi/GetCodeOwnersForPathInChange.java
@@ -22,7 +22,7 @@
 import com.google.gerrit.plugins.codeowners.backend.CodeOwner;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfigHierarchy;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerResolver;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.server.account.AccountControl;
 import com.google.gerrit.server.account.Accounts;
 import com.google.gerrit.server.account.ServiceUserClassifier;
diff --git a/java/com/google/gerrit/plugins/codeowners/restapi/RenameEmail.java b/java/com/google/gerrit/plugins/codeowners/restapi/RenameEmail.java
index 0ed505b..6f597fd 100644
--- a/java/com/google/gerrit/plugins/codeowners/restapi/RenameEmail.java
+++ b/java/com/google/gerrit/plugins/codeowners/restapi/RenameEmail.java
@@ -35,7 +35,7 @@
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfigFileUpdateScanner;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerReference;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerResolver;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
 import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.git.CommitUtil;
 import com.google.gerrit.server.permissions.PermissionBackend;
diff --git a/java/com/google/gerrit/plugins/codeowners/testing/RequiredApprovalSubject.java b/java/com/google/gerrit/plugins/codeowners/testing/RequiredApprovalSubject.java
index 68673df..e869632 100644
--- a/java/com/google/gerrit/plugins/codeowners/testing/RequiredApprovalSubject.java
+++ b/java/com/google/gerrit/plugins/codeowners/testing/RequiredApprovalSubject.java
@@ -22,7 +22,7 @@
 import com.google.common.truth.IntegerSubject;
 import com.google.common.truth.StringSubject;
 import com.google.common.truth.Subject;
-import com.google.gerrit.plugins.codeowners.config.RequiredApproval;
+import com.google.gerrit.plugins.codeowners.backend.config.RequiredApproval;
 import com.google.gerrit.truth.ListSubject;
 import com.google.gerrit.truth.OptionalSubject;
 import java.util.Optional;
diff --git a/java/com/google/gerrit/plugins/codeowners/validation/CodeOwnerConfigValidator.java b/java/com/google/gerrit/plugins/codeowners/validation/CodeOwnerConfigValidator.java
index 08915e4..17235cd 100644
--- a/java/com/google/gerrit/plugins/codeowners/validation/CodeOwnerConfigValidator.java
+++ b/java/com/google/gerrit/plugins/codeowners/validation/CodeOwnerConfigValidator.java
@@ -37,11 +37,11 @@
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerReference;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerResolver;
 import com.google.gerrit.plugins.codeowners.backend.PathCodeOwners;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.InvalidPluginConfigurationException;
 import com.google.gerrit.plugins.codeowners.common.ChangedFile;
 import com.google.gerrit.plugins.codeowners.common.CodeOwnerConfigValidationPolicy;
 import com.google.gerrit.plugins.codeowners.common.MergeCommitStrategy;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
-import com.google.gerrit.plugins.codeowners.config.InvalidPluginConfigurationException;
 import com.google.gerrit.plugins.codeowners.util.JgitPath;
 import com.google.gerrit.server.IdentifiedUser;
 import com.google.gerrit.server.PatchSetUtil;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CheckCodeOwnerConfigFilesIT.java b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CheckCodeOwnerConfigFilesIT.java
index 9a31ca1..5be55be 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CheckCodeOwnerConfigFilesIT.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CheckCodeOwnerConfigFilesIT.java
@@ -40,9 +40,9 @@
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfig;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfigImportMode;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfigReference;
+import com.google.gerrit.plugins.codeowners.backend.config.BackendConfig;
 import com.google.gerrit.plugins.codeowners.backend.findowners.FindOwnersBackend;
 import com.google.gerrit.plugins.codeowners.backend.proto.ProtoBackend;
-import com.google.gerrit.plugins.codeowners.config.BackendConfig;
 import com.google.inject.Inject;
 import java.util.HashMap;
 import java.util.List;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CheckCodeOwnerConfigFilesInRevisionIT.java b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CheckCodeOwnerConfigFilesInRevisionIT.java
index b67f0f0..3d71b53 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CheckCodeOwnerConfigFilesInRevisionIT.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CheckCodeOwnerConfigFilesInRevisionIT.java
@@ -27,11 +27,11 @@
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerBackend;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfig;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerSet;
+import com.google.gerrit.plugins.codeowners.backend.config.BackendConfig;
 import com.google.gerrit.plugins.codeowners.backend.findowners.FindOwnersBackend;
 import com.google.gerrit.plugins.codeowners.backend.findowners.FindOwnersCodeOwnerConfigParser;
 import com.google.gerrit.plugins.codeowners.backend.proto.ProtoBackend;
 import com.google.gerrit.plugins.codeowners.backend.proto.ProtoCodeOwnerConfigParser;
-import com.google.gerrit.plugins.codeowners.config.BackendConfig;
 import com.google.gerrit.plugins.codeowners.util.JgitPath;
 import java.util.HashMap;
 import java.util.List;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CheckCodeOwnerIT.java b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CheckCodeOwnerIT.java
index 5cd6e88..282594b 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CheckCodeOwnerIT.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CheckCodeOwnerIT.java
@@ -38,9 +38,9 @@
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfigImportMode;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfigReference;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerResolver;
+import com.google.gerrit.plugins.codeowners.backend.config.BackendConfig;
 import com.google.gerrit.plugins.codeowners.backend.findowners.FindOwnersBackend;
 import com.google.gerrit.plugins.codeowners.backend.proto.ProtoBackend;
-import com.google.gerrit.plugins.codeowners.config.BackendConfig;
 import com.google.gerrit.plugins.codeowners.restapi.CheckCodeOwnerCapability;
 import com.google.gerrit.plugins.codeowners.util.JgitPath;
 import com.google.gerrit.server.ServerInitiated;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CodeOwnerConfigValidatorIT.java b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CodeOwnerConfigValidatorIT.java
index 2e5e73b..fe9bdc1 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CodeOwnerConfigValidatorIT.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CodeOwnerConfigValidatorIT.java
@@ -46,11 +46,11 @@
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfigReference;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerResolver;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerSet;
+import com.google.gerrit.plugins.codeowners.backend.config.BackendConfig;
 import com.google.gerrit.plugins.codeowners.backend.findowners.FindOwnersBackend;
 import com.google.gerrit.plugins.codeowners.backend.findowners.FindOwnersCodeOwnerConfigParser;
 import com.google.gerrit.plugins.codeowners.backend.proto.ProtoBackend;
 import com.google.gerrit.plugins.codeowners.backend.proto.ProtoCodeOwnerConfigParser;
-import com.google.gerrit.plugins.codeowners.config.BackendConfig;
 import com.google.inject.Inject;
 import org.eclipse.jgit.lib.AnyObjectId;
 import org.eclipse.jgit.lib.ObjectId;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CodeOwnersPluginConfigValidatorIT.java b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CodeOwnersPluginConfigValidatorIT.java
index 01ff95b..7f6e660 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CodeOwnersPluginConfigValidatorIT.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/CodeOwnersPluginConfigValidatorIT.java
@@ -26,15 +26,15 @@
 import com.google.gerrit.plugins.codeowners.acceptance.AbstractCodeOwnersIT;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerBackendId;
 import com.google.gerrit.plugins.codeowners.backend.FallbackCodeOwners;
+import com.google.gerrit.plugins.codeowners.backend.config.BackendConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.GeneralConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.OverrideApprovalConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.RequiredApproval;
+import com.google.gerrit.plugins.codeowners.backend.config.RequiredApprovalConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.StatusConfig;
 import com.google.gerrit.plugins.codeowners.backend.proto.ProtoBackend;
 import com.google.gerrit.plugins.codeowners.common.MergeCommitStrategy;
-import com.google.gerrit.plugins.codeowners.config.BackendConfig;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
-import com.google.gerrit.plugins.codeowners.config.GeneralConfig;
-import com.google.gerrit.plugins.codeowners.config.OverrideApprovalConfig;
-import com.google.gerrit.plugins.codeowners.config.RequiredApproval;
-import com.google.gerrit.plugins.codeowners.config.RequiredApprovalConfig;
-import com.google.gerrit.plugins.codeowners.config.StatusConfig;
 import org.eclipse.jgit.lib.Config;
 import org.eclipse.jgit.revwalk.RevCommit;
 import org.eclipse.jgit.revwalk.RevObject;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/GetCodeOwnerBranchConfigIT.java b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/GetCodeOwnerBranchConfigIT.java
index ef9a688..d022d13 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/GetCodeOwnerBranchConfigIT.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/GetCodeOwnerBranchConfigIT.java
@@ -29,12 +29,12 @@
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerBackend;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerBackendId;
 import com.google.gerrit.plugins.codeowners.backend.FallbackCodeOwners;
+import com.google.gerrit.plugins.codeowners.backend.config.BackendConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.GeneralConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.OverrideApprovalConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.RequiredApprovalConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.StatusConfig;
 import com.google.gerrit.plugins.codeowners.common.MergeCommitStrategy;
-import com.google.gerrit.plugins.codeowners.config.BackendConfig;
-import com.google.gerrit.plugins.codeowners.config.GeneralConfig;
-import com.google.gerrit.plugins.codeowners.config.OverrideApprovalConfig;
-import com.google.gerrit.plugins.codeowners.config.RequiredApprovalConfig;
-import com.google.gerrit.plugins.codeowners.config.StatusConfig;
 import org.junit.Before;
 import org.junit.Test;
 
diff --git a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/GetCodeOwnerConfigFilesIT.java b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/GetCodeOwnerConfigFilesIT.java
index b9df0b3..da9c694 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/GetCodeOwnerConfigFilesIT.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/GetCodeOwnerConfigFilesIT.java
@@ -24,9 +24,9 @@
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerBackend;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfig;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerSet;
+import com.google.gerrit.plugins.codeowners.backend.config.BackendConfig;
 import com.google.gerrit.plugins.codeowners.backend.findowners.FindOwnersBackend;
 import com.google.gerrit.plugins.codeowners.backend.proto.ProtoBackend;
-import com.google.gerrit.plugins.codeowners.config.BackendConfig;
 import com.google.gerrit.plugins.codeowners.util.JgitPath;
 import org.junit.Before;
 import org.junit.Test;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/GetCodeOwnerProjectConfigIT.java b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/GetCodeOwnerProjectConfigIT.java
index 39ea0fe..64f81af 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/GetCodeOwnerProjectConfigIT.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/GetCodeOwnerProjectConfigIT.java
@@ -33,12 +33,12 @@
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerBackend;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerBackendId;
 import com.google.gerrit.plugins.codeowners.backend.FallbackCodeOwners;
+import com.google.gerrit.plugins.codeowners.backend.config.BackendConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.GeneralConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.OverrideApprovalConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.RequiredApprovalConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.StatusConfig;
 import com.google.gerrit.plugins.codeowners.common.MergeCommitStrategy;
-import com.google.gerrit.plugins.codeowners.config.BackendConfig;
-import com.google.gerrit.plugins.codeowners.config.GeneralConfig;
-import com.google.gerrit.plugins.codeowners.config.OverrideApprovalConfig;
-import com.google.gerrit.plugins.codeowners.config.RequiredApprovalConfig;
-import com.google.gerrit.plugins.codeowners.config.StatusConfig;
 import com.google.inject.Inject;
 import org.junit.Before;
 import org.junit.Test;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/RenameEmailIT.java b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/RenameEmailIT.java
index b9e7502..74e0d52 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/RenameEmailIT.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/acceptance/api/RenameEmailIT.java
@@ -41,8 +41,8 @@
 import com.google.gerrit.plugins.codeowners.api.RenameEmailResultInfo;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfig;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfigFileUpdateScanner;
+import com.google.gerrit.plugins.codeowners.backend.config.BackendConfig;
 import com.google.gerrit.plugins.codeowners.backend.proto.ProtoBackend;
-import com.google.gerrit.plugins.codeowners.config.BackendConfig;
 import com.google.gerrit.plugins.codeowners.restapi.RenameEmail;
 import com.google.inject.Inject;
 import java.util.Optional;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/acceptance/restapi/RenameEmailRestIT.java b/javatests/com/google/gerrit/plugins/codeowners/acceptance/restapi/RenameEmailRestIT.java
index 5978272..70f7b22 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/acceptance/restapi/RenameEmailRestIT.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/acceptance/restapi/RenameEmailRestIT.java
@@ -23,8 +23,8 @@
 import com.google.gerrit.plugins.codeowners.acceptance.AbstractCodeOwnersIT;
 import com.google.gerrit.plugins.codeowners.api.RenameEmailInput;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerBackendId;
+import com.google.gerrit.plugins.codeowners.backend.config.BackendConfig;
 import com.google.gerrit.plugins.codeowners.backend.proto.ProtoBackend;
-import com.google.gerrit.plugins.codeowners.config.BackendConfig;
 import com.google.inject.Inject;
 import org.junit.Before;
 import org.junit.Test;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithAllUsersAsFallbackCodeOwnersTest.java b/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithAllUsersAsFallbackCodeOwnersTest.java
index 9a9707a..4cf078c 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithAllUsersAsFallbackCodeOwnersTest.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithAllUsersAsFallbackCodeOwnersTest.java
@@ -22,8 +22,8 @@
 import com.google.gerrit.entities.Change;
 import com.google.gerrit.plugins.codeowners.acceptance.AbstractCodeOwnersTest;
 import com.google.gerrit.plugins.codeowners.acceptance.testsuite.CodeOwnerConfigOperations;
+import com.google.gerrit.plugins.codeowners.backend.config.GeneralConfig;
 import com.google.gerrit.plugins.codeowners.common.CodeOwnerStatus;
-import com.google.gerrit.plugins.codeowners.config.GeneralConfig;
 import com.google.gerrit.plugins.codeowners.testing.FileCodeOwnerStatusSubject;
 import com.google.gerrit.plugins.codeowners.util.JgitPath;
 import com.google.gerrit.server.notedb.ChangeNotes;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithSelfApprovalsIgnoredTest.java b/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithSelfApprovalsIgnoredTest.java
index 032cfda..e6bb57f 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithSelfApprovalsIgnoredTest.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheckWithSelfApprovalsIgnoredTest.java
@@ -23,8 +23,8 @@
 import com.google.gerrit.extensions.api.changes.ReviewInput;
 import com.google.gerrit.extensions.common.LabelDefinitionInput;
 import com.google.gerrit.plugins.codeowners.acceptance.AbstractCodeOwnersTest;
+import com.google.gerrit.plugins.codeowners.backend.config.OverrideApprovalConfig;
 import com.google.gerrit.plugins.codeowners.common.CodeOwnerStatus;
-import com.google.gerrit.plugins.codeowners.config.OverrideApprovalConfig;
 import com.google.gerrit.plugins.codeowners.testing.FileCodeOwnerStatusSubject;
 import com.google.gerrit.plugins.codeowners.util.JgitPath;
 import com.google.gerrit.server.notedb.ChangeNotes;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerConfigHierarchyTest.java b/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerConfigHierarchyTest.java
index af08aa3..79885dc 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerConfigHierarchyTest.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/backend/CodeOwnerConfigHierarchyTest.java
@@ -29,7 +29,7 @@
 import com.google.gerrit.plugins.codeowners.acceptance.AbstractCodeOwnersTest;
 import com.google.gerrit.plugins.codeowners.acceptance.testsuite.CodeOwnerConfigOperations;
 import com.google.gerrit.plugins.codeowners.acceptance.testsuite.TestPathExpressions;
-import com.google.gerrit.plugins.codeowners.config.InvalidPluginConfigurationException;
+import com.google.gerrit.plugins.codeowners.backend.config.InvalidPluginConfigurationException;
 import com.google.inject.Inject;
 import java.io.IOException;
 import java.nio.file.Paths;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/config/AbstractRequiredApprovalConfigTest.java b/javatests/com/google/gerrit/plugins/codeowners/backend/config/AbstractRequiredApprovalConfigTest.java
similarity index 95%
rename from javatests/com/google/gerrit/plugins/codeowners/config/AbstractRequiredApprovalConfigTest.java
rename to javatests/com/google/gerrit/plugins/codeowners/backend/config/AbstractRequiredApprovalConfigTest.java
index 42a32dd..f1da349 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/config/AbstractRequiredApprovalConfigTest.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/backend/config/AbstractRequiredApprovalConfigTest.java
@@ -12,16 +12,19 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration.SECTION_CODE_OWNERS;
+import static com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration.SECTION_CODE_OWNERS;
 import static com.google.gerrit.plugins.codeowners.testing.RequiredApprovalSubject.assertThat;
 import static com.google.gerrit.server.project.ProjectCache.illegalState;
 import static com.google.gerrit.testing.GerritJUnit.assertThrows;
 
 import com.google.common.collect.ImmutableList;
 import com.google.gerrit.plugins.codeowners.acceptance.AbstractCodeOwnersTest;
+import com.google.gerrit.plugins.codeowners.backend.config.AbstractRequiredApprovalConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.InvalidPluginConfigurationException;
+import com.google.gerrit.plugins.codeowners.backend.config.RequiredApproval;
 import com.google.gerrit.server.git.validators.CommitValidationMessage;
 import com.google.gerrit.server.git.validators.ValidationMessage;
 import com.google.gerrit.server.project.ProjectLevelConfig;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/config/BUILD b/javatests/com/google/gerrit/plugins/codeowners/backend/config/BUILD
similarity index 100%
rename from javatests/com/google/gerrit/plugins/codeowners/config/BUILD
rename to javatests/com/google/gerrit/plugins/codeowners/backend/config/BUILD
diff --git a/javatests/com/google/gerrit/plugins/codeowners/config/BackendConfigTest.java b/javatests/com/google/gerrit/plugins/codeowners/backend/config/BackendConfigTest.java
similarity index 95%
rename from javatests/com/google/gerrit/plugins/codeowners/config/BackendConfigTest.java
rename to javatests/com/google/gerrit/plugins/codeowners/backend/config/BackendConfigTest.java
index 3d7f709..761f7da 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/config/BackendConfigTest.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/backend/config/BackendConfigTest.java
@@ -12,11 +12,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.gerrit.plugins.codeowners.config.BackendConfig.KEY_BACKEND;
-import static com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration.SECTION_CODE_OWNERS;
+import static com.google.gerrit.plugins.codeowners.backend.config.BackendConfig.KEY_BACKEND;
+import static com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration.SECTION_CODE_OWNERS;
 import static com.google.gerrit.testing.GerritJUnit.assertThrows;
 import static com.google.gerrit.truth.OptionalSubject.assertThat;
 
@@ -26,6 +26,8 @@
 import com.google.gerrit.entities.BranchNameKey;
 import com.google.gerrit.plugins.codeowners.acceptance.AbstractCodeOwnersTest;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerBackendId;
+import com.google.gerrit.plugins.codeowners.backend.config.BackendConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.InvalidPluginConfigurationException;
 import com.google.gerrit.plugins.codeowners.backend.findowners.FindOwnersBackend;
 import com.google.gerrit.plugins.codeowners.backend.proto.ProtoBackend;
 import com.google.gerrit.server.git.validators.CommitValidationMessage;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/config/CodeOwnersPluginConfigurationTest.java b/javatests/com/google/gerrit/plugins/codeowners/backend/config/CodeOwnersPluginConfigurationTest.java
similarity index 98%
rename from javatests/com/google/gerrit/plugins/codeowners/config/CodeOwnersPluginConfigurationTest.java
rename to javatests/com/google/gerrit/plugins/codeowners/backend/config/CodeOwnersPluginConfigurationTest.java
index 2277bd4..25420b5 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/config/CodeOwnersPluginConfigurationTest.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/backend/config/CodeOwnersPluginConfigurationTest.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
 import static com.google.common.collect.ImmutableSet.toImmutableSet;
 import static com.google.common.truth.Truth.assertThat;
@@ -39,6 +39,14 @@
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfig;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfigUpdate;
 import com.google.gerrit.plugins.codeowners.backend.FallbackCodeOwners;
+import com.google.gerrit.plugins.codeowners.backend.config.BackendConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.GeneralConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.InvalidPluginConfigurationException;
+import com.google.gerrit.plugins.codeowners.backend.config.OverrideApprovalConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.RequiredApproval;
+import com.google.gerrit.plugins.codeowners.backend.config.RequiredApprovalConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.StatusConfig;
 import com.google.gerrit.plugins.codeowners.backend.findowners.FindOwnersBackend;
 import com.google.gerrit.plugins.codeowners.common.MergeCommitStrategy;
 import com.google.gerrit.server.IdentifiedUser;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/config/GeneralConfigTest.java b/javatests/com/google/gerrit/plugins/codeowners/backend/config/GeneralConfigTest.java
similarity index 93%
rename from javatests/com/google/gerrit/plugins/codeowners/config/GeneralConfigTest.java
rename to javatests/com/google/gerrit/plugins/codeowners/backend/config/GeneralConfigTest.java
index 5ab585b..e3864ef 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/config/GeneralConfigTest.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/backend/config/GeneralConfigTest.java
@@ -12,21 +12,21 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration.SECTION_CODE_OWNERS;
-import static com.google.gerrit.plugins.codeowners.config.GeneralConfig.DEFAULT_MAX_PATHS_IN_CHANGE_MESSAGES;
-import static com.google.gerrit.plugins.codeowners.config.GeneralConfig.KEY_ENABLE_IMPLICIT_APPROVALS;
-import static com.google.gerrit.plugins.codeowners.config.GeneralConfig.KEY_ENABLE_VALIDATION_ON_COMMIT_RECEIVED;
-import static com.google.gerrit.plugins.codeowners.config.GeneralConfig.KEY_ENABLE_VALIDATION_ON_SUBMIT;
-import static com.google.gerrit.plugins.codeowners.config.GeneralConfig.KEY_FALLBACK_CODE_OWNERS;
-import static com.google.gerrit.plugins.codeowners.config.GeneralConfig.KEY_FILE_EXTENSION;
-import static com.google.gerrit.plugins.codeowners.config.GeneralConfig.KEY_GLOBAL_CODE_OWNER;
-import static com.google.gerrit.plugins.codeowners.config.GeneralConfig.KEY_MAX_PATHS_IN_CHANGE_MESSAGES;
-import static com.google.gerrit.plugins.codeowners.config.GeneralConfig.KEY_MERGE_COMMIT_STRATEGY;
-import static com.google.gerrit.plugins.codeowners.config.GeneralConfig.KEY_OVERRIDE_INFO_URL;
-import static com.google.gerrit.plugins.codeowners.config.GeneralConfig.KEY_READ_ONLY;
+import static com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration.SECTION_CODE_OWNERS;
+import static com.google.gerrit.plugins.codeowners.backend.config.GeneralConfig.DEFAULT_MAX_PATHS_IN_CHANGE_MESSAGES;
+import static com.google.gerrit.plugins.codeowners.backend.config.GeneralConfig.KEY_ENABLE_IMPLICIT_APPROVALS;
+import static com.google.gerrit.plugins.codeowners.backend.config.GeneralConfig.KEY_ENABLE_VALIDATION_ON_COMMIT_RECEIVED;
+import static com.google.gerrit.plugins.codeowners.backend.config.GeneralConfig.KEY_ENABLE_VALIDATION_ON_SUBMIT;
+import static com.google.gerrit.plugins.codeowners.backend.config.GeneralConfig.KEY_FALLBACK_CODE_OWNERS;
+import static com.google.gerrit.plugins.codeowners.backend.config.GeneralConfig.KEY_FILE_EXTENSION;
+import static com.google.gerrit.plugins.codeowners.backend.config.GeneralConfig.KEY_GLOBAL_CODE_OWNER;
+import static com.google.gerrit.plugins.codeowners.backend.config.GeneralConfig.KEY_MAX_PATHS_IN_CHANGE_MESSAGES;
+import static com.google.gerrit.plugins.codeowners.backend.config.GeneralConfig.KEY_MERGE_COMMIT_STRATEGY;
+import static com.google.gerrit.plugins.codeowners.backend.config.GeneralConfig.KEY_OVERRIDE_INFO_URL;
+import static com.google.gerrit.plugins.codeowners.backend.config.GeneralConfig.KEY_READ_ONLY;
 import static com.google.gerrit.testing.GerritJUnit.assertThrows;
 import static com.google.gerrit.truth.OptionalSubject.assertThat;
 
@@ -36,6 +36,7 @@
 import com.google.gerrit.plugins.codeowners.acceptance.AbstractCodeOwnersTest;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerReference;
 import com.google.gerrit.plugins.codeowners.backend.FallbackCodeOwners;
+import com.google.gerrit.plugins.codeowners.backend.config.GeneralConfig;
 import com.google.gerrit.plugins.codeowners.common.CodeOwnerConfigValidationPolicy;
 import com.google.gerrit.plugins.codeowners.common.MergeCommitStrategy;
 import com.google.gerrit.server.git.validators.CommitValidationMessage;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/config/OverrideApprovalConfigTest.java b/javatests/com/google/gerrit/plugins/codeowners/backend/config/OverrideApprovalConfigTest.java
similarity index 88%
rename from javatests/com/google/gerrit/plugins/codeowners/config/OverrideApprovalConfigTest.java
rename to javatests/com/google/gerrit/plugins/codeowners/backend/config/OverrideApprovalConfigTest.java
index 3ea4e18..41a1abc 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/config/OverrideApprovalConfigTest.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/backend/config/OverrideApprovalConfigTest.java
@@ -12,13 +12,16 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
 import static com.google.gerrit.plugins.codeowners.testing.RequiredApprovalSubject.assertThat;
 import static com.google.gerrit.server.project.ProjectCache.illegalState;
 
 import com.google.common.collect.ImmutableList;
 import com.google.gerrit.acceptance.config.GerritConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.AbstractRequiredApprovalConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.OverrideApprovalConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.RequiredApproval;
 import com.google.gerrit.server.project.ProjectState;
 import org.eclipse.jgit.lib.Config;
 import org.junit.Before;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/config/RequiredApprovalConfigTest.java b/javatests/com/google/gerrit/plugins/codeowners/backend/config/RequiredApprovalConfigTest.java
similarity index 90%
rename from javatests/com/google/gerrit/plugins/codeowners/config/RequiredApprovalConfigTest.java
rename to javatests/com/google/gerrit/plugins/codeowners/backend/config/RequiredApprovalConfigTest.java
index 37da12d..3409816 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/config/RequiredApprovalConfigTest.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/backend/config/RequiredApprovalConfigTest.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
 import static com.google.common.truth.Truth.assertThat;
 import static com.google.gerrit.plugins.codeowners.testing.RequiredApprovalSubject.assertThat;
@@ -21,6 +21,9 @@
 
 import com.google.common.collect.ImmutableList;
 import com.google.gerrit.acceptance.config.GerritConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.AbstractRequiredApprovalConfig;
+import com.google.gerrit.plugins.codeowners.backend.config.RequiredApproval;
+import com.google.gerrit.plugins.codeowners.backend.config.RequiredApprovalConfig;
 import com.google.gerrit.server.project.ProjectState;
 import org.eclipse.jgit.lib.Config;
 import org.junit.Before;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/config/RequiredApprovalTest.java b/javatests/com/google/gerrit/plugins/codeowners/backend/config/RequiredApprovalTest.java
similarity index 98%
rename from javatests/com/google/gerrit/plugins/codeowners/config/RequiredApprovalTest.java
rename to javatests/com/google/gerrit/plugins/codeowners/backend/config/RequiredApprovalTest.java
index fba885d..51e160b 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/config/RequiredApprovalTest.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/backend/config/RequiredApprovalTest.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
 import static com.google.common.truth.Truth.assertThat;
 import static com.google.gerrit.server.project.ProjectCache.illegalState;
@@ -25,6 +25,7 @@
 import com.google.gerrit.entities.PatchSet;
 import com.google.gerrit.entities.PatchSetApproval;
 import com.google.gerrit.plugins.codeowners.acceptance.AbstractCodeOwnersTest;
+import com.google.gerrit.plugins.codeowners.backend.config.RequiredApproval;
 import com.google.gerrit.server.project.ProjectState;
 import com.google.gerrit.server.util.time.TimeUtil;
 import java.util.Arrays;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/config/StatusConfigTest.java b/javatests/com/google/gerrit/plugins/codeowners/backend/config/StatusConfigTest.java
similarity index 96%
rename from javatests/com/google/gerrit/plugins/codeowners/config/StatusConfigTest.java
rename to javatests/com/google/gerrit/plugins/codeowners/backend/config/StatusConfigTest.java
index 6ad8f3b..ae97a67 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/config/StatusConfigTest.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/backend/config/StatusConfigTest.java
@@ -12,12 +12,12 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.plugins.codeowners.config;
+package com.google.gerrit.plugins.codeowners.backend.config;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration.SECTION_CODE_OWNERS;
-import static com.google.gerrit.plugins.codeowners.config.StatusConfig.KEY_DISABLED;
-import static com.google.gerrit.plugins.codeowners.config.StatusConfig.KEY_DISABLED_BRANCH;
+import static com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration.SECTION_CODE_OWNERS;
+import static com.google.gerrit.plugins.codeowners.backend.config.StatusConfig.KEY_DISABLED;
+import static com.google.gerrit.plugins.codeowners.backend.config.StatusConfig.KEY_DISABLED_BRANCH;
 import static com.google.gerrit.testing.GerritJUnit.assertThrows;
 
 import com.google.common.collect.ImmutableList;
@@ -26,6 +26,7 @@
 import com.google.gerrit.entities.BranchNameKey;
 import com.google.gerrit.entities.RefNames;
 import com.google.gerrit.plugins.codeowners.acceptance.AbstractCodeOwnersTest;
+import com.google.gerrit.plugins.codeowners.backend.config.StatusConfig;
 import com.google.gerrit.server.git.validators.CommitValidationMessage;
 import com.google.gerrit.server.git.validators.ValidationMessage;
 import com.google.gerrit.server.project.ProjectLevelConfig;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/restapi/CodeOwnerProjectConfigJsonTest.java b/javatests/com/google/gerrit/plugins/codeowners/restapi/CodeOwnerProjectConfigJsonTest.java
index 3042859..5861aa4 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/restapi/CodeOwnerProjectConfigJsonTest.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/restapi/CodeOwnerProjectConfigJsonTest.java
@@ -35,11 +35,11 @@
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerBackendId;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfigScanner;
 import com.google.gerrit.plugins.codeowners.backend.FallbackCodeOwners;
+import com.google.gerrit.plugins.codeowners.backend.config.CodeOwnersPluginConfiguration;
+import com.google.gerrit.plugins.codeowners.backend.config.RequiredApproval;
 import com.google.gerrit.plugins.codeowners.backend.findowners.FindOwnersBackend;
 import com.google.gerrit.plugins.codeowners.backend.proto.ProtoBackend;
 import com.google.gerrit.plugins.codeowners.common.MergeCommitStrategy;
-import com.google.gerrit.plugins.codeowners.config.CodeOwnersPluginConfiguration;
-import com.google.gerrit.plugins.codeowners.config.RequiredApproval;
 import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.project.BranchResource;
 import com.google.gerrit.server.project.ProjectResource;