@Before
public void initDatabase() throws RepositoryException, IOException, RDFParseException {
store = new KiWiStore(dbConfig);
ssail = new KiWiSparqlSail(store);
repository = new SailRepository(ssail);
repository.initialize();
context1 = repository.getValueFactory().createURI("http://localhost/test/" + RandomStringUtils.randomAlphanumeric(8));
context2 = repository.getValueFactory().createURI("http://localhost/test/" + RandomStringUtils.randomAlphanumeric(8));