private synchronized void closeWriter() {
if (printWriter != null) {
printWriter.flush();
printWriter.close();
printWriter = null;
}
if (fileWriter != null) {
try {
fileWriter.close();
} catch (IOException e) {
// ignore
}
fileWriter = null;
}
if (fileName != null && FileUtils.length(fileName) == 0) {
FileUtils.tryDelete(fileName);
}
}
