public void removeQuota(final String user) throws UserNotFoundException,
QuotaNotFoundException, StorageException {
synchronized (lock) {
File file = getQuotaFile(user);
if (!file.exists()) {
throw new QuotaNotFoundException("No quota for user: " + user);
}
try {
FileUtils.forceDelete(file);
} catch (IOException ex) {
throw new StorageException(ex);