The first run will take quite a while since maven will download all the required dependencies in order to build everything.
In order to use the generated eclipse plugins in Eclipse, you will need m2e (https://www.eclipse.org/m2e) and the m2eclipse-tycho plugin (https://github.com/tesla/m2eclipse-tycho/). Update sites to install these plugins :
- m2e stable update site : http://download.eclipse.org/technology/m2e/releases/
- m2eclipse-tycho dev update site : http://repo1.maven.org/maven2/.m2e/connectors/m2eclipse-tycho/0.7.0/N/0.7.0.201309291400/