log.println("Checking graph import/export...");
xFooOut = new StreamSimulator(tempDir + "foo.rdf", false, param);
xRep.exportGraph(FileFormat.RDF_XML, xFooOut, foo, base);
xFooOut.closeOutput();
xFooIn = new StreamSimulator(tempDir + "foo.rdf", true, param);
try {
xRep.importGraph(FileFormat.RDF_XML, xFooIn, bar, base);
assure("importing existing graph did not fail", false);