public <T extends TokenIdentifier> void testReadWriteStorage()
throws IOException, NoSuchAlgorithmException{
// create tokenStorage Object
TokenStorage ts = new TokenStorage();
Token<T> token1 = new Token();
Token<T> token2 = new Token();
Text service1 = new Text("service1");
Text service2 = new Text("service2");
Collection<Text> services = new ArrayList<Text>();
services.add(service1);
services.add(service2);
token1.setService(service1);
token2.setService(service2);
ts.addToken(new Text("sometoken1"), token1);
ts.addToken(new Text("sometoken2"), token2);
// create keys and put it in
final KeyGenerator kg = KeyGenerator.getInstance(DEFAULT_HMAC_ALGORITHM);