Fix javadoc warnings

Change-Id: Ic1f2552f1a91779ee8b2a976ebe316981e6897df
diff --git a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/FlowModBuilderVer13.java b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/FlowModBuilderVer13.java
index a99aa81..e2fc30d 100644
--- a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/FlowModBuilderVer13.java
+++ b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/FlowModBuilderVer13.java
@@ -103,6 +103,7 @@
      * @param flowRule the flow rule to transform into a flow mod
      * @param factory the OpenFlow factory to use to build the flow mod
      * @param xid the transaction ID
+     * @param driverService the device driver service
      */
     protected FlowModBuilderVer13(FlowRule flowRule, OFFactory factory, Optional<Long> xid,
                                   Optional<DriverService> driverService) {