title: Append data into a file using Apache Commons I/O
body: <p>The <code>FileUtils.writeStringToFile(fileName, text)</code> function of Apache Commons I/O overwrites previous text in a file. I would like to append data to my file. Is there any way I could use Commons I/O for the same? I can do it using normal <code>BufferedWriter</code> from Java but I'm curious regarding the same using Commons I/O.</p>