checkstyle rule to check copyrights

Change-Id: Ia9bab40b5fe64fca539058a4316371f7acc0f387
diff --git a/src/main/java/org/onosproject/segmentrouting/cli/TunnelAddCommand.java b/src/main/java/org/onosproject/segmentrouting/cli/TunnelAddCommand.java
index 4a36ebd..d3b46ab 100644
--- a/src/main/java/org/onosproject/segmentrouting/cli/TunnelAddCommand.java
+++ b/src/main/java/org/onosproject/segmentrouting/cli/TunnelAddCommand.java
@@ -1,4 +1,3 @@
-
 /*
  * Copyright 2015-present Open Networking Laboratory
  *
@@ -77,4 +76,4 @@
                 break;
         }
     }
-}
\ No newline at end of file
+}