The sources seem to be left in a migration state. There is a pom.xml but there is no src/main/java folder. There is also a build.xml which indicates its more of an ant build. the parent contains no modules so it looks unfinished.
Did you check out the sources and try to build it? If it does not compile it cant be added to a repository.
If it can be fixed you may add it to github creating a repository: http://blog.rueedlinger.ch/2012/09/use-github-as-maven-remote-repository/
the groupid would be org.apache.commons, the artifactId commons-feedparser. Most other libs from commons follow this convention.