###Create a Maven Web Application Project
mvn archetype:generate -DgroupId=org.picketlink.tutorial -DartifactId=picketlink-app -DarchetypeArtifactId=maven-archetype-webapp
You can also use your favorite IDE to create the project. The important thing here is that you end up with a project with the following structure:
picketlink-app/
src/
main/