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