Hi there :)
Douglas, are you aware that the PSI parser projects already use Maven? There is a Maven repository at the EBI which you only need to add in your POM file, like in this pom.xml for the examples project:
Alternatively, if you are using Nexus, you may want to add the EBI repository to it.
If you want to add everything to the sonatype repository, which is an option, the complication is going to be with the transactional dependencies, some of them may not be in that central repo either.
Cheers!
Bruno