For now the functionality is developer limited.

The files created are:

allDonations.txt

and recent(includes the recent X count of donations in the file),
top(includes the top X count of donations in the file),
session(includes the X count of donations done after the program has started in the file),

To work it, in the main class there is 2 things needs to be defined.

    /**
     * Streamtip Client Id
     */
    private static final String clientId = "YOURCLIENTIDHERE";

    /**
     * Streamtip Access Token
     */
    private static final String accessToken = "YOURACCESSTOKENHERE";

If you have too much donations in your history, I suggest to comment out allDonations generation in the engine.