Не получается записать текст в файлы.

package com.javarush.task.task19.task1915; /* Дублируем текст */ //d:\a.txt import java.io.*; import java.sql.SQLOutput; public class Solution { public static TestString testString = new TestString(); public static void main(String[] args) throws IOException { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); String fileName = reader.readLine(); PrintStream consolStream = System.out; ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); PrintStream stream = new PrintStream(outputStream); System.setOut(stream); testString.printSomething(); String result = outputStream. toString(); FileOutputStream fos = new FileOutputStream(fileName); stream= new PrintStream(fos); reader.close(); System.setOut(consolStream); System.out.println(result); fos.close(); System.out.println(outputStream.toString()); } public static class TestString { public void printSomething() { System.out.println("it's a text for testing"); } } }