Fix Javadoc warnings

Change-Id: I857d8bd7d9fc0862f3c0097d3e65cbedfb997b0f
diff --git a/apps/sdnip/src/main/java/org/onosproject/sdnip/config/Interface.java b/apps/sdnip/src/main/java/org/onosproject/sdnip/config/Interface.java
index b495f07..2179653 100644
--- a/apps/sdnip/src/main/java/org/onosproject/sdnip/config/Interface.java
+++ b/apps/sdnip/src/main/java/org/onosproject/sdnip/config/Interface.java
@@ -44,6 +44,7 @@
      * @param connectPoint the connect point this interface is mapped to
      * @param ipAddresses the IP addresses for the interface
      * @param macAddress the MAC address of the interface
+     * @param vlan VLAN identifier
      */
     public Interface(ConnectPoint connectPoint,
                      Set<InterfaceIpAddress> ipAddresses,