Add the 'final' modifier to a few private fields.

Author: carlosame

src/io/sf/carte/doc/agent/net/DefaultUserAgent.java

@@ -50,7 +50,7 @@
  */
 public class DefaultUserAgent extends AbstractUserAgent {
 
-	private CSSDOMImplementation domImpl;
+	private final CSSDOMImplementation domImpl;
 	private EntityResolver resolver = createEntityResolver();
 
 	protected DefaultUserAgent(EnumSet<Parser2.Flag> parserFlags, boolean setDefaultSheet) {

src/io/sf/carte/doc/agent/net/ResourceDownloader.java

@@ -36,7 +36,7 @@
  */
 abstract public class ResourceDownloader<C> extends Thread {
 
-	private URL url;
+	private final URL url;
 	protected C nativeContent = null;
 	protected List<DownloadListener<C>> listeners = new LinkedList<DownloadListener<C>>();
 	private String contentType = null;