update a comment.

git-svn-id: http://anonsvn.jboss.org/repos/javassist/trunk@450 30ef5769-5b8d-40dd-aea6-55b5d6557bb3

src/main/javassist/util/proxy/ProxyFactory.java

@@ -126,6 +126,8 @@ import javassist.bytecode.*;
  *
  * @see MethodHandler
  * @since 3.1
+ * @author Muga Nishizawa
+ * @author Shigeru Chiba
  */
 public class ProxyFactory {
     private Class superClass;