Github user ejwhite922 commented on the issue:
https://github.com/apache/incubator-rya/pull/106
The adapter code was based off an earlier version of Jena when it was still
an incubator project. Some of the packages were deprecated and didn't make it
when Jena became a full Apache project. I revived some of those packages and
updated them to work with the latest Jena 3.1.0. Any package with "legacy" in
its name is a 3.1.0 compatible version of a deprecated package from the
incubator Jena project.
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