Comment 1 for bug 839353

Fix commited :

/**
 * Common interface for QueryFactory implementations
 *
 * @author tiwe
 *
 * @param <Q>
 * @param <SQ>
 */
public interface QueryFactory<Q extends Query<?>, SQ extends Detachable> {
    /**
     * Create a new Query
     *
     * @return
     */
    Q query();

    /**
     * Create a new Sub query
     *
     * @return
     */
    SQ subQuery();
}