IntelliJ IDEA not showing my module/project

For Maven Projects that don't show up you can right click your pom.xml and click 'Add as Maven Project'.

You can go to File-> Project Structure and then define it as a Source Folder

In Intellij, Right click on your parent pom file and click add as maven project

This is way late, but deleting my .idea folder did the trick.

1. Close IntelliJ
2. cd <project-path>
3. rm -rf .idea