We use the startUsingJavaJunit project on Github

https://github.com/eviltester/startUsingJavaJUnit

This has a simple JUnit test that we will use to help us check that our install of Java, Maven and IntelliJ have worked correctly.

This project also has a test document called 'speed run install instructions' that provide step by step instructions for installing Java, Maven and IntelliJ and these might be useful if you get stuck.

https://github.com/eviltester/startUsingJavaJUnit/blob/master/speedrun_install_java_checklist.md