diff --git a/core/api/src/main/java/org/onlab/onos/net/AnnotationsUtil.java b/core/api/src/main/java/org/onlab/onos/net/AnnotationsUtil.java
index 7adc571..f76e66a 100644
--- a/core/api/src/main/java/org/onlab/onos/net/AnnotationsUtil.java
+++ b/core/api/src/main/java/org/onlab/onos/net/AnnotationsUtil.java
@@ -15,6 +15,9 @@
  */
 package org.onlab.onos.net;
 
+/**
+ * Utility for processing annotations.
+ */
 public final class AnnotationsUtil {
 
     public static boolean isEqual(Annotations lhs, Annotations rhs) {