diff a/src/java.sql.rowset/share/classes/javax/sql/rowset/serial/SerialRef.java b/src/java.sql.rowset/share/classes/javax/sql/rowset/serial/SerialRef.java
--- a/src/java.sql.rowset/share/classes/javax/sql/rowset/serial/SerialRef.java
+++ b/src/java.sql.rowset/share/classes/javax/sql/rowset/serial/SerialRef.java
@@ -223,10 +223,15 @@
     }
 
     /**
      * readObject is called to restore the state of the SerialRef from
      * a stream.
+     * @param s the {@code ObjectInputStream} to read from.
+     *
+     * @throws  ClassNotFoundException if the class of a serialized object
+     *          could not be found.
+     * @throws  IOException if an I/O error occurs.
      */
     private void readObject(ObjectInputStream s)
             throws IOException, ClassNotFoundException {
         ObjectInputStream.GetField fields = s.readFields();
         object = fields.get("object", null);
@@ -235,10 +240,12 @@
     }
 
     /**
      * writeObject is called to save the state of the SerialRef
      * to a stream.
+     * @param s the {@code ObjectOutputStream} to write to.
+     + @throws  IOException if I/O errors occur.
      */
     private void writeObject(ObjectOutputStream s)
             throws IOException {
 
         ObjectOutputStream.PutField fields = s.putFields();