Fixing javadocs.

Change-Id: Ifc894fce6366baf6cfed655b4bfc5885710be77c
diff --git a/src/main/java/org/onosproject/segmentrouting/TunnelHandler.java b/src/main/java/org/onosproject/segmentrouting/TunnelHandler.java
index 1c07093..2405fa6 100644
--- a/src/main/java/org/onosproject/segmentrouting/TunnelHandler.java
+++ b/src/main/java/org/onosproject/segmentrouting/TunnelHandler.java
@@ -50,6 +50,7 @@
      * Creates a tunnel.
      *
      * @param tunnel tunnel reference to create a tunnel
+     * @return true if creation succeeded
      */
     public boolean createTunnel(Tunnel tunnel) {