protected File newFile;

        protected Writer writer;

        protected CharMappingItem item;

        protected MappingUpdater(final CharMappingItem newItem) {
            try {
                newFile = ComponentUtil.getSystemHelper().createTempFile(MAPPING, ".txt");
                writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(newFile), Constants.UTF_8));

        protected File newFile;

        protected Writer writer;

        protected ProtwordsItem item;

        protected ProtwordsUpdater(final ProtwordsItem newItem) {
            try {
                newFile = ComponentUtil.getSystemHelper().createTempFile(PROTWORDS, ".txt");
                writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(newFile), Constants.UTF_8));

        protected File newFile;

        protected Writer writer;

        protected StopwordsItem item;

        protected SynonymUpdater(final StopwordsItem newItem) {
            try {
                newFile = ComponentUtil.getSystemHelper().createTempFile(STOPWORDS, ".txt");
                writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(newFile), Constants.UTF_8));

        protected File newFile;

        protected Writer writer;

        protected KuromojiItem item;

        protected KuromojiUpdater(final KuromojiItem newItem) {
            try {
                newFile = ComponentUtil.getSystemHelper().createTempFile(KUROMOJI, ".txt");
                writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(newFile), Constants.UTF_8));

            } catch (final Exception e) {
                if (newFile != null) {
                    newFile.delete();
                }
                throw new DictionaryException("Failed to write a userDict file.", e);
            }
            item = newItem;
        }

        public StemmerOverrideItem write(final StemmerOverrideItem oldItem) {
            try {

        protected File newFile;

        protected Writer writer;

        protected SynonymItem item;

        protected SynonymUpdater(final SynonymItem newItem) {
            try {
                newFile = ComponentUtil.getSystemHelper().createTempFile(SYNONYM, ".txt");
                writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(newFile), Constants.UTF_8));

    public void testStorePropertiesOutputStreamString() throws IOException {
        final Properties outProperties = new Properties();
        outProperties.setProperty("a", "A");
        final File file = tempFolder.newFile("hoge.properties");
        final FileOutputStream outputStream = OutputStreamUtil.create(file);
        PropertiesUtil.store(outProperties, outputStream, "comments");
        CloseableUtil.close(outputStream);

				Level:   ErrorKind,
				Message: msg,
				Time:    time.Now().UTC(),
				Trace:   &log.Trace{Message: msg},
			})
		}
	}

	path := filepath.Join(w.opts.Directory, w.opts.FileNameFunc())
	f, err := newFile(path)
	if err != nil {
		return fmt.Errorf("unable to create new file at %v: %w", path, err)
	}

	w.f = f

	return nil
}

    bufferHelper("no newlines at all", "no newlines at all");
    bufferHelper("two lines\nbut no newline at end", "two lines\n", "but no newline at end");
    bufferHelper(
        "\nempty first line\nno newline at end", "\n", "empty first line\n", "no newline at end");
    bufferHelper("three\rlines\rno newline at end", "three\r", "lines\r", "no newline at end");
    bufferHelper("mixed\nline\rendings\r\n", "mixed\n", "line\r", "endings\r\n");
  }

    bufferHelper("no newlines at all", "no newlines at all");
    bufferHelper("two lines\nbut no newline at end", "two lines\n", "but no newline at end");
    bufferHelper(
        "\nempty first line\nno newline at end", "\n", "empty first line\n", "no newline at end");
    bufferHelper("three\rlines\rno newline at end", "three\r", "lines\r", "no newline at end");
    bufferHelper("mixed\nline\rendings\r\n", "mixed\n", "line\r", "endings\r\n");
  }