final Statement st1 = vf.createStatement(bnode, uri1, plainLit);
final Statement st2 = vf.createStatement(uri1, uri2, langLit, uri2);
final Statement st3 = vf.createStatement(uri1, uri2, dtLit);
final Statement st4 = vf.createStatement(uri1, uri2, litWithNewline);
final Statement st5 = vf.createStatement(uri1, uri2, litWithSingleQuotes);
final Statement st6 = vf.createStatement(uri1, uri2, litWithDoubleQuotes);
final ByteArrayOutputStream out = new ByteArrayOutputStream();
final RDFWriter rdfWriter = rdfWriterFactory.getWriter(out);
final WriterConfig writerConfig = rdfWriter.getWriterConfig();
writerConfig.set(BasicWriterSettings.RDF_LANGSTRING_TO_LANG_LITERAL, true);