javadoc fixes

Change-Id: I3b4fc2d99f42b2413a535fb411b9c19bdd186ad8
diff --git a/core/api/src/main/java/org/onlab/onos/cluster/DefaultControllerNode.java b/core/api/src/main/java/org/onlab/onos/cluster/DefaultControllerNode.java
index 3aee1a6..4ed972f 100644
--- a/core/api/src/main/java/org/onlab/onos/cluster/DefaultControllerNode.java
+++ b/core/api/src/main/java/org/onlab/onos/cluster/DefaultControllerNode.java
@@ -54,6 +54,7 @@
      *
      * @param id instance identifier
      * @param ip instance IP address
+     * @param tcpPort TCP port
      */
     public DefaultControllerNode(NodeId id, IpAddress ip, int tcpPort) {
         this.id = id;