@@ -66,10 +66,14 @@ * </pre> * * @since 1.8 */ public class DocTreeScanner<R,P> implements DocTreeVisitor<R,P> { + /** + * Constructor for subclasses to call. + */ + public DocTreeScanner() {} /** * Scans a single node. * @param node the node to be scanned * @param p a parameter value passed to the visit method