import org.codelibs.core.exception.IORuntimeException;

/**
 * Utility class for {@link Writer} operations.
 *
 * @author koichik
 */
public abstract class WriterUtil {

    /**
     * Do not instantiate.
     */
    protected WriterUtil() {
    }

    /**
     * Creates a {@link Writer} to output to a stream with the specified encoding.
     *
     * @param os the stream (must not be {@literal null})

        assertArgumentNotNull("in", in);
        assertArgumentNotNull("out", out);
        assertArgumentNotEmpty("encoding", encoding);

        final Writer os = WriterUtil.create(wrap(out), encoding);
        return copyInternal(wrap(in), os);
    }

    // ////////////////////////////////////////////////////////////////
    // from Reader to Writer
    //
    /**

        final Properties outProperties = new Properties();
        outProperties.setProperty("a", "A");
        final File file = tempFolder.newFile("hoge.properties");
        final Writer writer = WriterUtil.create(file);
        PropertiesUtil.store(outProperties, writer, "comments");
        CloseableUtil.close(writer);
        final Properties properties = new Properties();
        PropertiesUtil.load(properties, file);

        assertArgumentNotNull("props", props);
        assertArgumentNotNull("file", file);
        assertArgumentNotEmpty("encoding", encoding);

        final Writer writer = WriterUtil.create(file, encoding);
        try {
            props.store(writer, comments);
        } catch (final IOException e) {
            throw new IORuntimeException(e);
        } finally {