code: @Override
      public void assertStatement(org.openrdf.model.Statement stmnt) {
  	try {
  	    if (currentContext==null) {
  		manager.getConnection().add(stmnt);
  	    } else {
  		manager.getConnection().add(stmnt, currentContext);
  	    }
  	} catch (org.openrdf.repository.RepositoryException e) {
  	}
      }
docs: /* (non-Javadoc)
  @see org.openprovenance.prov.rdf.GraphBuilder#assertStatement(org.openrdf.model.Statement)