Clean code and refine javadocs for control plane manager

Change-Id: Ieaaebde69ce2ab54cb819cfad1baa34ee97a7d66
diff --git a/apps/cpman/app/src/main/java/org/onosproject/cpman/impl/DefaultControlLoad.java b/apps/cpman/app/src/main/java/org/onosproject/cpman/impl/DefaultControlLoad.java
index ef32cab..0882bd3 100644
--- a/apps/cpman/app/src/main/java/org/onosproject/cpman/impl/DefaultControlLoad.java
+++ b/apps/cpman/app/src/main/java/org/onosproject/cpman/impl/DefaultControlLoad.java
@@ -31,6 +31,13 @@
     private final MetricsDatabase mdb;
     private final ControlMetricType type;
 
+    /**
+     * Constructs a control load using the given metrics database and
+     * control metric type.
+     *
+     * @param mdb  metrics database
+     * @param type control metric type
+     */
     public DefaultControlLoad(MetricsDatabase mdb, ControlMetricType type) {
         this.mdb = mdb;
         this.type = type;