private void createEmptyNotesOntology() {
   try {
     OWLOntologyManager notesOntologyManager = WebProtegeOWLManager.createOWLOntologyManager();
     notesOntology = notesOntologyManager.createOntology();
     IRI notesOntologyDocumentIRI = IRI.create(notesOntologyDocument);
     notesOntologyManager.setOntologyDocumentIRI(notesOntology, notesOntologyDocumentIRI);
     notesOntologyDocument.getParentFile().mkdirs();
     BinaryOWLOntologyDocumentFormat notesOntologyDocumentFormat =
         new BinaryOWLOntologyDocumentFormat();
     notesOntologyManager.saveOntology(
         notesOntology, notesOntologyDocumentFormat, notesOntologyDocumentIRI);
   } catch (OWLOntologyCreationException e) {
     throw new RuntimeException(e);
   } catch (OWLOntologyStorageException e) {
     throw new RuntimeException(e);
   }
 }