It is an artifact to help developers create brand new Light Weight Java Game Library (LWJGL) based projects.
Where ever you create your projects, run the following to create a brand new LWJGL and follow the prompts to customize your project
mvn archetype:generate \
-DarchetypeGroupId=io.paulbaker.archetypes \
-DarchetypeArtifactId=lwjgl-archetype \
-DarchetypeVersion=1.2
To make running your application simpler, the pom is configured to run whenever a jar is created.
Observe this by running mvn package