Fixed javadoc warnings in slew of legacy code. We need to keep up on this; the old stuff is pretty sloppy.
diff --git a/of/ctl/src/main/java/org/onlab/onos/of/controller/impl/OFChannelHandler.java b/of/ctl/src/main/java/org/onlab/onos/of/controller/impl/OFChannelHandler.java
index c85eb21..bcbbd26 100644
--- a/of/ctl/src/main/java/org/onlab/onos/of/controller/impl/OFChannelHandler.java
+++ b/of/ctl/src/main/java/org/onlab/onos/of/controller/impl/OFChannelHandler.java
@@ -632,7 +632,7 @@
          * @param m The OFMessage that has just been received
          * @param details A string giving more details about the exact nature
          * of the problem.
-         * @return
+         * @return display string
          */
         // needs to be protected because enum members are actually subclasses
         protected String getSwitchStateMessage(OFChannelHandler h,
@@ -682,7 +682,7 @@
 
         /**
          * Log an OpenFlow error message from a switch.
-         * @param sw The switch that sent the error
+         * @param h The switch that sent the error
          * @param error The error message
          */
         @LogMessageDoc(level = "ERROR",
@@ -1185,7 +1185,7 @@
     /**
      * Return a string describing this switch based on the already available
      * information (DPID and/or remote socket).
-     * @return
+     * @return display string
      */
     private String getSwitchInfoString() {
         if (sw != null) {
diff --git a/of/ctl/src/main/java/org/onlab/onos/of/controller/impl/RoleManager.java b/of/ctl/src/main/java/org/onlab/onos/of/controller/impl/RoleManager.java
index f2e9581..ee3a37f 100644
--- a/of/ctl/src/main/java/org/onlab/onos/of/controller/impl/RoleManager.java
+++ b/of/ctl/src/main/java/org/onlab/onos/of/controller/impl/RoleManager.java
@@ -69,7 +69,6 @@
      * Send NX role request message to the switch requesting the specified
      * role.
      *
-     * @param sw switch to send the role request message to
      * @param role role to request
      */
     private int sendNxRoleRequest(RoleState role) throws IOException {
@@ -318,8 +317,7 @@
      * Extract the role from an OFVendor message if the message is a
      * Nicira role reply. Otherwise return null.
      *
-     * @param h The channel handler receiving the message
-     * @param vendorMessage The vendor message to parse.
+     * @param experimenterMsg message
      * @return The role in the message if the message is a Nicira role
      * reply, null otherwise.
      * @throws SwitchStateException If the message is a Nicira role reply
@@ -363,7 +361,7 @@
 
     /**
      * Extract the role information from an OF1.3 Role Reply Message.
-     * @param h
+     *
      * @param rrmsg the role message
      * @return RoleReplyInfo object
      * @throws SwitchStateException if the role information could not be extracted.