diff --git a/src/services/helpers/ui/comparator.service.js b/src/services/helpers/ui/comparator.service.js
index 24bf9f9..824f464 100644
--- a/src/services/helpers/ui/comparator.service.js
+++ b/src/services/helpers/ui/comparator.service.js
@@ -1,3 +1,21 @@
+
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * 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
+
+ * 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.
+ */
+
+
 (function() {
   'use strict';