Erro null pointer

public class Teste { 
    private UsuarioDAO uDAO = DAOFactory.getInstance().getUsuarioDAO();
    
    public void testar(){
        
        Usuario u1 = new Usuario();
        u1.setId(1);
        u1.setNome("João");
        u1.setSexo("f");
        u1.setDataNasc("05/10/1985");
        u1.setSetor("cap");
        u1.setSenha("123456");
        
        uDAO.save( u1 );
    }   
     
    public static void main(String[] args){
        Teste teste = new Teste();
        
        teste.testar();
    }
    
}