diff a/src/java.sql.rowset/share/classes/javax/sql/rowset/RowSetMetaDataImpl.java b/src/java.sql.rowset/share/classes/javax/sql/rowset/RowSetMetaDataImpl.java
--- a/src/java.sql.rowset/share/classes/javax/sql/rowset/RowSetMetaDataImpl.java
+++ b/src/java.sql.rowset/share/classes/javax/sql/rowset/RowSetMetaDataImpl.java
@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2020, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
@@ -943,10 +943,15 @@
         return interfaces.isInstance(this);
     }
 
     static final long serialVersionUID = 6893806403181801867L;
 
+    /**
+     * {@code ColInfo} objects are used to store information
+     * about each column in the {@code RowSet} object for which
+     * this {@code RowSetMetaDataImpl} object was created.
+     */
     private class ColInfo implements Serializable {
         /**
          * The field that indicates whether the value in this column is a number
          * that is incremented automatically, which makes the value read-only.
          * <code>true</code> means that the value in this column