diff --git a/java/com/google/gerrit/server/patch/DiffExecutor.java b/java/com/google/gerrit/server/patch/DiffExecutor.java
index 072c2da..63d5c50 100644
--- a/java/com/google/gerrit/server/patch/DiffExecutor.java
+++ b/java/com/google/gerrit/server/patch/DiffExecutor.java
@@ -16,6 +16,7 @@
 
 import static java.lang.annotation.RetentionPolicy.RUNTIME;
 
+import com.google.gerrit.server.patch.filediff.PatchListLoader;
 import com.google.inject.BindingAnnotation;
 import java.lang.annotation.Retention;
 import java.util.concurrent.ExecutorService;
diff --git a/java/com/google/gerrit/server/patch/DiffMappings.java b/java/com/google/gerrit/server/patch/DiffMappings.java
index a6f026e..57132f8 100644
--- a/java/com/google/gerrit/server/patch/DiffMappings.java
+++ b/java/com/google/gerrit/server/patch/DiffMappings.java
@@ -23,8 +23,8 @@
 import com.google.gerrit.server.patch.GitPositionTransformer.Mapping;
 import com.google.gerrit.server.patch.GitPositionTransformer.Range;
 import com.google.gerrit.server.patch.GitPositionTransformer.RangeMapping;
-import com.google.gerrit.server.patch.entities.Edit;
-import com.google.gerrit.server.patch.entities.FileEdits;
+import com.google.gerrit.server.patch.filediff.Edit;
+import com.google.gerrit.server.patch.filediff.FileEdits;
 import java.util.List;
 
 /** Mappings derived from diffs. */
diff --git a/java/com/google/gerrit/server/patch/PatchListCacheImpl.java b/java/com/google/gerrit/server/patch/PatchListCacheImpl.java
index b663b9d..a3e9a54 100644
--- a/java/com/google/gerrit/server/patch/PatchListCacheImpl.java
+++ b/java/com/google/gerrit/server/patch/PatchListCacheImpl.java
@@ -25,6 +25,7 @@
 import com.google.gerrit.server.cache.CacheBackend;
 import com.google.gerrit.server.cache.CacheModule;
 import com.google.gerrit.server.config.GerritServerConfig;
+import com.google.gerrit.server.patch.filediff.PatchListLoader;
 import com.google.inject.Inject;
 import com.google.inject.Module;
 import com.google.inject.Singleton;
@@ -37,7 +38,7 @@
 /** Provides a cached list of {@link PatchListEntry}. */
 @Singleton
 public class PatchListCacheImpl implements PatchListCache {
-  static final String FILE_NAME = "diff";
+  public static final String FILE_NAME = "diff";
   static final String INTRA_NAME = "diff_intraline";
   static final String DIFF_SUMMARY = "diff_summary";
 
diff --git a/java/com/google/gerrit/server/patch/PatchListEntry.java b/java/com/google/gerrit/server/patch/PatchListEntry.java
index c91355a..1d1d0ea 100644
--- a/java/com/google/gerrit/server/patch/PatchListEntry.java
+++ b/java/com/google/gerrit/server/patch/PatchListEntry.java
@@ -77,7 +77,7 @@
   // Note: When adding new fields, the serialVersionUID in PatchListKey must be
   // incremented so that entries from the cache are automatically invalidated.
 
-  PatchListEntry(
+  public PatchListEntry(
       FileHeader hdr, List<Edit> editList, Set<Edit> editsDueToRebase, long size, long sizeDelta) {
     changeType = toChangeType(hdr);
     patchType = toPatchType(hdr);
diff --git a/java/com/google/gerrit/server/patch/entities/Edit.java b/java/com/google/gerrit/server/patch/filediff/Edit.java
similarity index 96%
rename from java/com/google/gerrit/server/patch/entities/Edit.java
rename to java/com/google/gerrit/server/patch/filediff/Edit.java
index 7d39d69..b1b336e 100644
--- a/java/com/google/gerrit/server/patch/entities/Edit.java
+++ b/java/com/google/gerrit/server/patch/filediff/Edit.java
@@ -12,7 +12,7 @@
 //  See the License for the specific language governing permissions and
 //  limitations under the License.
 
-package com.google.gerrit.server.patch.entities;
+package com.google.gerrit.server.patch.filediff;
 
 import com.google.auto.value.AutoValue;
 
diff --git a/java/com/google/gerrit/server/patch/EditTransformer.java b/java/com/google/gerrit/server/patch/filediff/EditTransformer.java
similarity index 98%
rename from java/com/google/gerrit/server/patch/EditTransformer.java
rename to java/com/google/gerrit/server/patch/filediff/EditTransformer.java
index 06e6f72..55568e4 100644
--- a/java/com/google/gerrit/server/patch/EditTransformer.java
+++ b/java/com/google/gerrit/server/patch/filediff/EditTransformer.java
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.server.patch;
+package com.google.gerrit.server.patch.filediff;
 
 import static com.google.common.collect.ImmutableList.toImmutableList;
 import static com.google.common.collect.ImmutableSet.toImmutableSet;
@@ -25,13 +25,13 @@
 import com.google.common.collect.Multimap;
 import com.google.common.flogger.FluentLogger;
 import com.google.gerrit.entities.Patch;
+import com.google.gerrit.server.patch.DiffMappings;
+import com.google.gerrit.server.patch.GitPositionTransformer;
 import com.google.gerrit.server.patch.GitPositionTransformer.Mapping;
 import com.google.gerrit.server.patch.GitPositionTransformer.OmitPositionOnConflict;
 import com.google.gerrit.server.patch.GitPositionTransformer.Position;
 import com.google.gerrit.server.patch.GitPositionTransformer.PositionedEntity;
 import com.google.gerrit.server.patch.GitPositionTransformer.Range;
-import com.google.gerrit.server.patch.entities.Edit;
-import com.google.gerrit.server.patch.entities.FileEdits;
 import java.util.List;
 import java.util.Objects;
 import java.util.Optional;
diff --git a/java/com/google/gerrit/server/patch/entities/FileEdits.java b/java/com/google/gerrit/server/patch/filediff/FileEdits.java
similarity index 96%
rename from java/com/google/gerrit/server/patch/entities/FileEdits.java
rename to java/com/google/gerrit/server/patch/filediff/FileEdits.java
index c914919..c51cc45 100644
--- a/java/com/google/gerrit/server/patch/entities/FileEdits.java
+++ b/java/com/google/gerrit/server/patch/filediff/FileEdits.java
@@ -12,7 +12,7 @@
 //  See the License for the specific language governing permissions and
 //  limitations under the License.
 
-package com.google.gerrit.server.patch.entities;
+package com.google.gerrit.server.patch.filediff;
 
 import static com.google.common.collect.ImmutableList.toImmutableList;
 
diff --git a/java/com/google/gerrit/server/patch/PatchListLoader.java b/java/com/google/gerrit/server/patch/filediff/PatchListLoader.java
similarity index 94%
rename from java/com/google/gerrit/server/patch/PatchListLoader.java
rename to java/com/google/gerrit/server/patch/filediff/PatchListLoader.java
index df34aa6..5b7eddb 100644
--- a/java/com/google/gerrit/server/patch/PatchListLoader.java
+++ b/java/com/google/gerrit/server/patch/filediff/PatchListLoader.java
@@ -1,19 +1,21 @@
-// Copyright (C) 2009 The Android Open Source Project
+//  Copyright (C) 2020 The Android Open Source Project
 //
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
 //
-// http://www.apache.org/licenses/LICENSE-2.0
+//  http://www.apache.org/licenses/LICENSE-2.0
 //
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+//
+//
 //
 
-package com.google.gerrit.server.patch;
+package com.google.gerrit.server.patch.filediff;
 
 import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.collect.ImmutableList.toImmutableList;
@@ -38,8 +40,17 @@
 import com.google.gerrit.server.git.GitRepositoryManager;
 import com.google.gerrit.server.git.InMemoryInserter;
 import com.google.gerrit.server.git.MergeUtil;
-import com.google.gerrit.server.patch.EditTransformer.ContextAwareEdit;
-import com.google.gerrit.server.patch.entities.FileEdits;
+import com.google.gerrit.server.patch.AutoMerger;
+import com.google.gerrit.server.patch.ComparisonType;
+import com.google.gerrit.server.patch.DiffExecutor;
+import com.google.gerrit.server.patch.PatchList;
+import com.google.gerrit.server.patch.PatchListCache;
+import com.google.gerrit.server.patch.PatchListCacheImpl;
+import com.google.gerrit.server.patch.PatchListEntry;
+import com.google.gerrit.server.patch.PatchListKey;
+import com.google.gerrit.server.patch.PatchListNotAvailableException;
+import com.google.gerrit.server.patch.Text;
+import com.google.gerrit.server.patch.filediff.EditTransformer.ContextAwareEdit;
 import com.google.inject.Inject;
 import com.google.inject.assistedinject.Assisted;
 import java.io.IOException;
@@ -82,7 +93,7 @@
 import org.eclipse.jgit.util.io.DisabledOutputStream;
 
 public class PatchListLoader implements Callable<PatchList> {
-  static final FluentLogger logger = FluentLogger.forEnclosingClass();
+  public static final FluentLogger logger = FluentLogger.forEnclosingClass();
 
   public interface Factory {
     PatchListLoader create(PatchListKey key, Project.NameKey project);
diff --git a/java/com/google/gerrit/server/patch/gitfilediff/GitFileDiff.java b/java/com/google/gerrit/server/patch/gitfilediff/GitFileDiff.java
index f91d917..bce3d44 100644
--- a/java/com/google/gerrit/server/patch/gitfilediff/GitFileDiff.java
+++ b/java/com/google/gerrit/server/patch/gitfilediff/GitFileDiff.java
@@ -26,7 +26,7 @@
 import com.google.gerrit.server.cache.proto.Cache.GitFileDiffProto;
 import com.google.gerrit.server.cache.serialize.CacheSerializer;
 import com.google.gerrit.server.cache.serialize.ObjectIdConverter;
-import com.google.gerrit.server.patch.entities.Edit;
+import com.google.gerrit.server.patch.filediff.Edit;
 import com.google.protobuf.Descriptors.FieldDescriptor;
 import java.io.IOException;
 import java.util.Map;
diff --git a/javatests/com/google/gerrit/server/cache/serialize/entities/GitFileDiffSerializerTest.java b/javatests/com/google/gerrit/server/cache/serialize/entities/GitFileDiffSerializerTest.java
index baba43d..8030818 100644
--- a/javatests/com/google/gerrit/server/cache/serialize/entities/GitFileDiffSerializerTest.java
+++ b/javatests/com/google/gerrit/server/cache/serialize/entities/GitFileDiffSerializerTest.java
@@ -20,7 +20,7 @@
 import com.google.gerrit.entities.Patch.ChangeType;
 import com.google.gerrit.entities.Patch.FileMode;
 import com.google.gerrit.entities.Patch.PatchType;
-import com.google.gerrit.server.patch.entities.Edit;
+import com.google.gerrit.server.patch.filediff.Edit;
 import com.google.gerrit.server.patch.gitfilediff.GitFileDiff;
 import com.google.gerrit.server.patch.gitfilediff.GitFileDiff.Serializer;
 import java.util.Optional;