for (File f : files) {
if (FileUtils.getExtension(f.getName()) != null) {
Model model = ModelFactory.createDefaultModel();
InputStream s = new FileInputStream(f);
model.read(s, null, "TURTLE");
StmtIterator iterator = model.listStatements();
while(iterator.hasNext()) {
Statement st = iterator.next();
String subject = st.getSubject().toString();
String object = st.getObject().toString();
String predicate = st.getPredicate().toString();