private boolean salvarXml() throws IOException{
        boolean status;
        File f = new File("xmls/", renavam+".xml");
        if(f.exists())
            f.delete();
        
        status = f.createNewFile();
        
        FileWriter x = new FileWriter(f, true);
        x.write("<?xml version =  \"1.0\" encoding=\"UTF-8\"?>\n" + conteudo);
        x.close();
        return status;
    
    }