Does TDB 0.8.7 not get along with arq 2.8.6? The pom in the package cries out for 2.8.7-RC-2 of arq and 2.6.4-RC-1, and those aren't on central.
testVerySimpleQuery(com.basistech.jug.rdfdb.SimpleRoundTripTest) Time
elapsed: 0.81 sec <<< ERROR!
java.lang.NoClassDefFoundError: com/hp/hpl/jena/sparql/modify/UpdateVisitor
at com.hp.hpl.jena.tdb.TDB.initialization1(TDB.java:203)
at com.hp.hpl.jena.tdb.TDB.<clinit>(TDB.java:186)
at com.basistech.jug.rdfdb.jena.JenaStore.initialize(JenaStore.java:59)
