final RecordingModuleChangeListener listener = new RecordingModuleChangeListener();
monitor.addModificationListener(listener);
monitor.setInitialDelay(0);
monitor.setCheckInterval(1);
monitor.start();
Thread.sleep(500);
FileCopyUtils.copy("file1 text modified", new FileWriter(file1));
FileCopyUtils.copy("file2 text modified", new FileWriter(file2));