+ @After
+ public void tearDown() {
+ if( dclExecutorService != null ) {
+ dclExecutorService.shutdownNow();
+ }
+ }
+
+ /**
+ * Create a new test task. The task will operate on the backed database,
+ * and will use the proper background executor service.
+ *
+ * @return Test task initialized to clean up {@value #TOP_LEVEL} and its
+ * children.
+ */