code: private void checkInitialized()
          throws StorageException {
          if (storageAccountManager == null || !storageAccountManager.isInitialized()) {
              String error = "DuraStore must be initialized with an XML file " +
                             "containing storage account information before any " +
                             "further requests can be fulfilled.";
              throw new StorageException(error);
          }
      }
docs: /*
  Ensures that the account manager has been initialized