import javax.xml.transform.stream.StreamSource;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

public class XslTransformer {
    public static void main(String[] args) throws TransformerException, IOException {
        if (args.length < 3 || args.length > 4) {
            throw new IllegalArgumentException("USAGE: <style-sheet> <source-file> <dest-file> [dest-dir]");
        }