Fix javadoc warnings

Change-Id: I156c861729fd48d5e6792f810c342e1579482c04
diff --git a/web/api/src/main/java/org/onosproject/rest/resources/FlowsWebResource.java b/web/api/src/main/java/org/onosproject/rest/resources/FlowsWebResource.java
index 260a2b9..f77bb43 100644
--- a/web/api/src/main/java/org/onosproject/rest/resources/FlowsWebResource.java
+++ b/web/api/src/main/java/org/onosproject/rest/resources/FlowsWebResource.java
@@ -129,6 +129,7 @@
     /**
      * Creates a flow rule from a POST of a JSON string and attempts to apply it.
      *
+     * @param deviceId device identifier
      * @param stream input JSON
      * @return status of the request - CREATED if the JSON is correct,
      * BAD_REQUEST if the JSON is invalid