Open Eclipse and select your workspace
You should see a screen like this. Click on "Workbench"
This is your basic IDE view. Click on "File-->Import"
Select "Existing Maven Projects"
You'll be taken to this window, select "Browse"
Locate the downloaded source and select the root folder that contains "src" and "/pom.xml"
You will be presented with this window. Select "Finish"
You need to edit the "/pom.xml" and change the "Artifact Id" to your username
You will also need to rename the username package by selecting it, right clicking and choosing Refactor --> Rename