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/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfNbrImpl.java b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfNbrImpl.java
index 800d571..f563a39 100644
--- a/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfNbrImpl.java
+++ b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfNbrImpl.java
@@ -556,6 +556,7 @@
      * In addition, stop the possibly activated re transmission timer.
      *
      * @param ch netty channel instance
+     * @throws Exception on error
      */
     public void badLSReq(Channel ch) throws Exception {
         log.debug("OSPFNbr::badLSReq...!!!");
@@ -1932,4 +1933,4 @@
             return lsUpdateList;
         }
     }
-}
\ No newline at end of file
+}