Fix javadoc warnings

Change-Id: I156c861729fd48d5e6792f810c342e1579482c04
diff --git a/core/api/src/main/java/org/onosproject/net/edge/EdgePortService.java b/core/api/src/main/java/org/onosproject/net/edge/EdgePortService.java
index 44e4b66..94ab611 100644
--- a/core/api/src/main/java/org/onosproject/net/edge/EdgePortService.java
+++ b/core/api/src/main/java/org/onosproject/net/edge/EdgePortService.java
@@ -45,6 +45,7 @@
     /**
      * Returns a collection of all edge point for the specified device.
      *
+     * @param deviceId device identifier
      * @return iterable collection of all edge points for the device
      */
     Iterable<ConnectPoint> getEdgePoint(DeviceId deviceId);