java Line breaks not working

I'm writing a simple program that writes data to the selected file .
everything is going great except the line breaks \n the string is written in the file but without line breaks

I've tried \n and \n\r but nothing changed
the program :

    public void prepare(){
    String content = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n\r<data>\n\r<user><username>root</username><password>root</password></user>\n\r</data>";
    FileOutputStream fos = null;
    try {
        fos = new FileOutputStream(file);
    } catch (FileNotFoundException ex) {
        System.out.println("File Not Found .. prepare()");
    }
    byte b[] = content.getBytes();
    try {
        fos.write(b);
        fos.close();
    } catch (IOException ex) {
        System.out.println("IOException .. prepare()");
    }
}
public static void main(String args[]){
    File f = new File("D:\\test.xml");
    Database data = new Database(f);
    data.prepare();
}