AAA Service's Encryption/Decryption API's do not propagate exceptions

The AAAEncryptionService's encrypt and decrypt service methods never throw an exception if there is a problem during encrypion or decryption process.
This causes the exception to not be propagated to the caller of these services and they are not able to handle it in a custom way.

This defect is a request to have these services throw exceptions when they occur.

public interface AAAEncryptionService {
  public String encrypt(String data);
  public String decrypt(String encData);
  public byte[] encrypt(byte[] data);
  public byte[] decrypt(byte[] encData);
}