private void serializeEmployeeToFile(Employee employee, int id) {
    try {
      BufferedWriter write =
          new BufferedWriter(
              new FileWriter(pathToFolderWithEmployees.getAbsolutePath() + "/" + id + ".txt"));
      write.write(Integer.toString(id));
      write.newLine();
      write.write(employee.getName());
      write.newLine();
      write.write(employee.getLastName());
      write.newLine();
      write.write(employee.getAddress());
      write.newLine();
      write.write(Integer.toString(employee.getAge()));
      write.newLine();
      write.write(Integer.toString(employee.getCurrentPaymentBalance()));

      write.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }