/** writes content of all results to a file */
private String writeContentToFile(
final String shortTitle,
final File exportDirectory,
final String charset,
final QTIExportFormatter qef,
final String fileNameSuffix) {
// defining target filename
final StringBuilder tf = new StringBuilder();
tf.append(qef.getFileNamePrefix());
tf.append(Formatter.makeStringFilesystemSave(shortTitle));
tf.append("_");
final DateFormat myformat = new SimpleDateFormat("yyyy-MM-dd__hh-mm-ss__SSS");
final String timestamp = myformat.format(new Date());
tf.append(timestamp);
tf.append(fileNameSuffix);
final String targetFileName = tf.toString();
ExportUtil.writeContentToFile(targetFileName, qef.getReport(), exportDirectory, charset);
return targetFileName;
}
