Javadoc fixes

- fix missing Javadoc @param and @throw annotations
- enable checkstyle checks for method javadocs on non-private methods

Change-Id: I9a370419a699bab3225d85f2f641927600b9f11c
diff --git a/utils/misc/src/main/java/org/onlab/packet/IGMPQuery.java b/utils/misc/src/main/java/org/onlab/packet/IGMPQuery.java
index d79eaec..273ed25 100644
--- a/utils/misc/src/main/java/org/onlab/packet/IGMPQuery.java
+++ b/utils/misc/src/main/java/org/onlab/packet/IGMPQuery.java
@@ -121,6 +121,7 @@
      *
      * @param bb ByteBuffer pointing at the IGMP Query group address
      * @return the IGMP Group object
+     * @throws DeserializationException on serializer error
      */
     public IGMPGroup deserialize(ByteBuffer bb) throws DeserializationException {