Fix Javadoc warnings

Change-Id: Ia5fe7785f76da92abbf940599cbd3d7dc6ac2cc5
diff --git a/core/api/src/main/java/org/onosproject/net/host/InterfaceIpAddress.java b/core/api/src/main/java/org/onosproject/net/host/InterfaceIpAddress.java
index 4bf196d..8badb91 100644
--- a/core/api/src/main/java/org/onosproject/net/host/InterfaceIpAddress.java
+++ b/core/api/src/main/java/org/onosproject/net/host/InterfaceIpAddress.java
@@ -164,6 +164,8 @@
     /**
      * Compute the IP broadcast address.
      *
+     * @param ipAddress base IP address
+     * @param subnetAddress subnet specification
      * @return the IP broadcast address
      */
     public static IpAddress computeBroadcastAddress(IpAddress ipAddress, IpPrefix subnetAddress) {