diff --git a/.gitignore b/.gitignore
index 5fc420eea..62b082961 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,4 +3,5 @@ bin/
 .classpath
 .settings
 .project
-
+*.iml
+.idea
diff --git a/google-api-client-appengine/src/main/java/com/google/api/client/googleapis/extensions/appengine/testing/auth/oauth2/MockAppIdentityService.java b/google-api-client-appengine/src/main/java/com/google/api/client/googleapis/extensions/appengine/testing/auth/oauth2/MockAppIdentityService.java
index aea7cc04a..0a640a811 100644
--- a/google-api-client-appengine/src/main/java/com/google/api/client/googleapis/extensions/appengine/testing/auth/oauth2/MockAppIdentityService.java
+++ b/google-api-client-appengine/src/main/java/com/google/api/client/googleapis/extensions/appengine/testing/auth/oauth2/MockAppIdentityService.java
@@ -89,4 +89,7 @@ public String getServiceAccountName() {
   public ParsedAppId parseFullAppId(String fullAppId) {
     return null;
   }
+
+  @Override
+  public String getDefaultGcsBucketName() { return null; }
 }