title: FileUtils.readFileToString() from Apache Commons IO works incorrectly with Cyrillic
body: <p>I am using FileUtils.readFileToString to read contents of a text file with JSON at once. The file is UTF-8 encoded (w/o BOM). Yet, instead of cyrillic letters I get ?????? signs. Why?</p>
  
  <pre><code>public String getJSON() throws IOException
  {
      File customersFile = new File(this.STORAGE_FILE_PATH);
      return FileUtils.readFileToString(customersFile, StandardCharsets.UTF_8);
  }
  </code></pre>