Fix javadoc warnings

Change-Id: I3de24a04593f47c786f698f5ee1669b3d2f2fdfc
diff --git a/apps/openstackswitching/app/src/main/java/org/onosproject/openstackswitching/OpenstackSwitchingRulePopulator.java b/apps/openstackswitching/app/src/main/java/org/onosproject/openstackswitching/OpenstackSwitchingRulePopulator.java
index 014eeb8..92c2742 100644
--- a/apps/openstackswitching/app/src/main/java/org/onosproject/openstackswitching/OpenstackSwitchingRulePopulator.java
+++ b/apps/openstackswitching/app/src/main/java/org/onosproject/openstackswitching/OpenstackSwitchingRulePopulator.java
@@ -72,6 +72,7 @@
      * @param appId application id
      * @param flowObjectiveService FlowObjectiveService reference
      * @param deviceService DeviceService reference
+     * @param restHandler OpenstackRestHandler reference
      * @param driverService DriverService reference
      */
     public OpenstackSwitchingRulePopulator(ApplicationId appId,