Fix javadoc warnings

Change-Id: I3de24a04593f47c786f698f5ee1669b3d2f2fdfc
diff --git a/app/src/main/java/org/onosproject/olt/impl/AccessDeviceData.java b/app/src/main/java/org/onosproject/olt/impl/AccessDeviceData.java
index dee5f5a..1cfc62b 100644
--- a/app/src/main/java/org/onosproject/olt/impl/AccessDeviceData.java
+++ b/app/src/main/java/org/onosproject/olt/impl/AccessDeviceData.java
@@ -43,6 +43,7 @@
      * @param deviceId access device ID
      * @param uplink uplink port number
      * @param vlan device VLAN ID
+     * @param defaultVlan default device VLAN ID
      */
     public AccessDeviceData(DeviceId deviceId, PortNumber uplink, VlanId vlan,
                             Optional<VlanId> defaultVlan) {