diff --git a/src/main/java/com/googlesource/gerrit/plugins/findowners/Action.java b/src/main/java/com/googlesource/gerrit/plugins/findowners/Action.java
index 0e80906..c9b39fe 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/findowners/Action.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/findowners/Action.java
@@ -112,14 +112,13 @@
   }
 
   @Override
-  public Response<RestResult> apply(RevisionResource rev)
-      throws IOException, StorageException, BadRequestException {
+  public Response<RestResult> apply(RevisionResource rev) throws IOException, BadRequestException {
     return apply(rev.getChangeResource(), new Parameters());
   }
 
   // Used by integration tests, because they do not have ReviewDb Provider.
   public Response<RestResult> apply(ChangeResource rsrc, Parameters params)
-      throws StorageException, BadRequestException {
+      throws BadRequestException {
     ChangeData changeData = changeDataFactory.create(rsrc.getChange());
     return getChangeData(params, changeData);
   }
@@ -142,7 +141,7 @@
 
   /** Returns the current patchset number or the given patchsetNum if it is valid. */
   static int getValidPatchsetNum(ChangeData changeData, Integer patchsetNum)
-      throws StorageException, BadRequestException {
+      throws BadRequestException {
     int patchset = changeData.currentPatchSet().id().get();
     if (patchsetNum != null) {
       if (patchsetNum < 1 || patchsetNum > patchset) {
@@ -159,7 +158,7 @@
 
   /** REST API to return owners info of a change. */
   public Response<RestResult> getChangeData(Parameters params, ChangeData changeData)
-      throws StorageException, BadRequestException {
+      throws BadRequestException {
     int patchset = getValidPatchsetNum(changeData, params.patchset);
     ProjectState projectState = projectCache.get(changeData.project());
     Boolean useCache = params.nocache == null || !params.nocache;
diff --git a/src/main/java/com/googlesource/gerrit/plugins/findowners/Cache.java b/src/main/java/com/googlesource/gerrit/plugins/findowners/Cache.java
index 0a54970..62b124d 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/findowners/Cache.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/findowners/Cache.java
@@ -16,7 +16,6 @@
 
 import com.google.common.cache.CacheBuilder;
 import com.google.common.flogger.FluentLogger;
-import com.google.gerrit.exceptions.StorageException;
 import com.google.gerrit.server.account.AccountCache;
 import com.google.gerrit.server.account.Emails;
 import com.google.gerrit.server.git.GitRepositoryManager;
@@ -100,8 +99,7 @@
       AccountCache accountCache,
       Emails emails,
       GitRepositoryManager repoManager,
-      ChangeData changeData)
-      throws StorageException {
+      ChangeData changeData) {
     return get(
         useCache,
         permissionBackend,
@@ -122,8 +120,7 @@
       Emails emails,
       GitRepositoryManager repoManager,
       ChangeData changeData,
-      int patchset)
-      throws StorageException {
+      int patchset) {
     String branch = changeData.change().getDest().branch();
     String dbKey = Cache.makeKey(changeData.getId().get(), patchset, repoManager);
     // TODO: get changed files of the given patchset?
diff --git a/src/main/java/com/googlesource/gerrit/plugins/findowners/GetOwners.java b/src/main/java/com/googlesource/gerrit/plugins/findowners/GetOwners.java
index b786ecc..411ce02 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/findowners/GetOwners.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/findowners/GetOwners.java
@@ -15,7 +15,6 @@
 package com.googlesource.gerrit.plugins.findowners;
 
 import com.google.common.flogger.FluentLogger;
-import com.google.gerrit.exceptions.StorageException;
 import com.google.gerrit.extensions.restapi.BadRequestException;
 import com.google.gerrit.extensions.restapi.Response;
 import com.google.gerrit.extensions.restapi.RestReadView;
@@ -77,7 +76,7 @@
   }
 
   @Override
-  public Response<RestResult> apply(ChangeResource rsrc) throws IOException, StorageException {
+  public Response<RestResult> apply(ChangeResource rsrc) throws IOException {
     Action.Parameters params = new Action.Parameters();
     params.patchset = patchset;
     params.debug = (debug != null) ? Util.parseBoolean(debug) : null;