minor name changes and javadoc

Change-Id: I43a05d75392efad9ac004867027a31adcc18c6f5
diff --git a/core/api/src/test/java/org/onosproject/store/service/TestAtomicCounter.java b/core/api/src/test/java/org/onosproject/store/service/TestAtomicCounter.java
index 01209be..26a5040 100644
--- a/core/api/src/test/java/org/onosproject/store/service/TestAtomicCounter.java
+++ b/core/api/src/test/java/org/onosproject/store/service/TestAtomicCounter.java
@@ -48,6 +48,11 @@
     }
 
     @Override
+    public void set(long value) {
+        this.value.set(value);
+    }
+
+    @Override
     public long get() {
         return value.get();
     }