Run gradlew installDist.
Copy build/install/FritzJava to your desired location and create a valid credentials.txt inside the FritzJava directory where the app was built into.
After building the app you can change into the FritzJava directory and run the files inside bin.
CredentialParser assumes the following prefixes (e.g. username) and ": " as separator.
username: user
password: pw
switchAin: 1234567890
mailSender: mymail@mail.com
mailPassword: password
mailReceiver: myothermail@mail.com
SMTP_Server: smtp.mail.com