dir.register(watcher, new WatchEvent.Kind[]{
                StandardWatchEventKinds.ENTRY_CREATE,
                StandardWatchEventKinds.ENTRY_MODIFY,
                StandardWatchEventKinds.ENTRY_DELETE
            }, SensitivityWatchEventModifier.HIGH);

        try(PrintWriter pw = new PrintWriter("C:\\Temp\\log\\hwidlist\\2016-09-17-11.log")) {
            while (true) {
                pw.append("data\r\n");
                pw.flush();
                Thread.sleep(1000);
            }
        } catch (FileNotFoundException | InterruptedException e) {
            e.printStackTrace();
        }