Не проходит валидацию

package com.javarush.task.task31.task3112;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;

/*
Загрузчик файлов
*/
public class Solution {

    public static void main(String[] args) throws IOException {
        Path passwords = downloadFile("https://yastatic.net/morda-logo/i/citylogos/yandex19-logo-ru.png",
                Paths.get("/home/flowmaster/Projects/java/test/"));

//        for (String line : Files.readAllLines(passwords)) {
//            System.out.println(line);
//        }
    }

    public static Path downloadFile(String urlString, Path downloadDirectory) throws IOException {
        // implement this method
        URL urlSource = new URL(urlString);
        Path tempFile;
        try (InputStream urlStream = urlSource.openStream()) {
            tempFile = Files.createTempFile("temp-", "");
            Files.copy(urlStream, tempFile);
        }
        String fileName = Paths.get(urlString).getFileName().toString();
        Path target = Paths.get(downloadDirectory.toString(), fileName);
        Files.move(tempFile, target);
        return target;
    }
}