Return early for branches for which we do not want to create review notes

Change-Id: I6de283673a1cda19667b3694c68d02e47e516106
Signed-off-by: Edwin Kempin <ekempin@google.com>

src/main/java/com/googlesource/gerrit/plugins/reviewnotes/RefUpdateListener.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/RefUpdateListener.java b/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/RefUpdateListener.java
index f85d0ca..d8e0e83 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/RefUpdateListener.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/RefUpdateListener.java
@@ -18,6 +18,7 @@
 import com.google.gerrit.extensions.events.GitReferenceUpdatedListener;
 import com.google.gerrit.extensions.restapi.RestApiException;
 import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.reviewdb.client.RefNames;
 import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.config.GerritServerConfig;
 import com.google.gerrit.server.git.GitRepositoryManager;
@@ -96,6 +97,9 @@
   }
 
   private void createReviewNotes(Event e) {
+    if (!e.getRefName().startsWith(RefNames.REFS_HEADS)) {
+      return;
+    }
     try {
       retryHelper.execute(
           updateFactory -> {
@@ -103,14 +107,12 @@
             try (Repository git = repoManager.openRepository(projectName);
                 ReviewDb reviewDb = schema.open()) {
               CreateReviewNotes crn = reviewNotesFactory.create(reviewDb, projectName, git);
-              if (e.getRefName().startsWith("refs/heads/")) {
-                crn.createNotes(
-                    e.getRefName(),
-                    ObjectId.fromString(e.getOldObjectId()),
-                    ObjectId.fromString(e.getNewObjectId()),
-                    null);
-                crn.commitNotes();
-              }
+              crn.createNotes(
+                  e.getRefName(),
+                  ObjectId.fromString(e.getOldObjectId()),
+                  ObjectId.fromString(e.getNewObjectId()),
+                  null);
+              crn.commitNotes();
             }
             return null;
           });