It should have listed a number of archetypes, numbering each one. It is asking you to enter the number for the archetype you want.
By the way, you don't have to use an archetype to create a Maven project, you an always create the directory structure and pom.xml manually. I usually just borrow a working pom.xml that contains most of what I want (a pom.xml from a Spring example should do it for you) and start from that.
[Interestingly, when I ran the command you did if ran to completion successfully. I ended up with a simple pom.xml that including only junit as a dependnecy, and a simple directory structure with a hello-world app. Base on the results, I don't think this archetype is worthwhile; instead follow my advice on creating your own pom and directory structure]