Add missing @Override annotations

Change-Id: I51d488e4c4209e43af2c6ffa16d082a99d6985b8
Signed-off-by: Jacek Centkowski <jcentkowski@collab.net>
Signed-off-by: David Pursehouse <dpursehouse@collab.net>
diff --git a/src/test/java/com/googlesource/gerrit/plugins/webhooks/EventHandlerTest.java b/src/test/java/com/googlesource/gerrit/plugins/webhooks/EventHandlerTest.java
index 7dae524..56ef8c9 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/webhooks/EventHandlerTest.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/webhooks/EventHandlerTest.java
@@ -48,6 +48,7 @@
 
   private static final ProjectCreatedEvent PROJECT_CREATED =
       new ProjectCreatedEvent() {
+        @Override
         public NameKey getProjectNameKey() {
           return PROJECT_NAME;
         }
@@ -55,6 +56,7 @@
 
   private static final RefUpdatedEvent REF_UPDATED =
       new RefUpdatedEvent() {
+        @Override
         public NameKey getProjectNameKey() {
           return PROJECT_NAME;
         }