Помогите пожалуйста

public void save(OutputStream outputStream) throws Exception {

   // FileOutputStream fileOutputStream = new FileOutputStream(outputStream.toString());
    Properties pFile = new Properties();

        for (Map.Entry pair : properties.entrySet()) {
            pFile.setProperty(pair.getKey(), pair.getValue());
        }
    pFile.list(new PrintWriter(outputStream));
        outputStream.close();
}