Почему не выводит данные ?

public class FileProperties {
    private String name;
    private long size;
    private long compressedSize;
    private int compressionMethod;

    public FileProperties(String name, long size, long compressedSize, int compressionMethod) {
        this.name = name;
        this.size = size;
        this.compressedSize = compressedSize;
        this.compressionMethod = compressionMethod;
    }


    public String getName() {
        return name;
    }

    public long getSize() {
        return size;
    }

    public long getCompressedSize() {
        return compressedSize;
    }

    public int getCompressionMethod() {
        return compressionMethod;
    }

    public long getCompressionRatio() {

        return 100 - ((compressedSize * 100) / size);
    }

    @Override
    public String toString() {

        StringBuilder builder = new StringBuilder();
        builder.append(name);
        if (size > 0) {
            builder.append("\t");
            builder.append(size / 1024);
            builder.append(" Kb (");
            builder.append(compressedSize / 1024);
            builder.append(" Kb) сжатие: ");
            builder.append(getCompressionRatio());
            builder.append("%");
        }

        return builder.toString();
    }
}

public class ZipContentCommand extends ZipCommand {
    @Override
    public void execute() throws Exception {
        ConsoleHelper.writeMessage("Просмотр содержимого архива.");

        ZipFileManager zipFileManager = getZipFileManager();

        ConsoleHelper.writeMessage("Содержимое архива:");

        List<FileProperties> files = zipFileManager.getFilesList();
        for (FileProperties file : files) {
            ConsoleHelper.writeMessage(file.toString());
        }

        ConsoleHelper.writeMessage("Содержимое архива прочитано.");
    }
}

public List<FileProperties> getFilesList() throws Exception {

        if (!Files.isRegularFile(zipFile)) {
            throw new WrongZipFileException();
        }

        List<FileProperties> files = new ArrayList<>();

        try (ZipInputStream zipInputStream = new ZipInputStream(Files.newInputStream(zipFile))) {
            ZipEntry zipEntry = zipInputStream.getNextEntry();

            while (zipEntry != null) {

                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                copyData(zipInputStream, baos);

                FileProperties file = new FileProperties(zipEntry.getName(), zipEntry.getSize(), zipEntry.getCompressedSize(), zipEntry.getMethod());
                files.add(file);
                zipEntry = zipInputStream.getNextEntry();
            }
        }

        return files;
    }