added some javadoc comments

import org.apache.http.protocol.HttpContext;

import org.apache.http.protocol.HttpCoreContext;

/**

 * This class allows the developer to force the sending of credentials on the

 * first HTTP request.  Without this interceptor, all requests will first try

 * without credentials.

 * 

 * A subsequent retry will happen only under certain HTTP status codes.  Some

 * services will return a 404 instead of an expected 401 or 403.  This is for

 * security reasons.  As a side effect, it fools the Apache HTTP client into

 * thinking that the resource does not exist, even if it were authorized.  So

 * it will not retry it with credentials.

 *  

 * @author brian@inteligr8.com

 */

public class PreemptiveAuthInterceptor implements HttpRequestInterceptor {

	/**

	 * @see HttpRequestInterceptor#process(HttpRequest, HttpContext)

	 */

    public void process(final HttpRequest request, final HttpContext context) throws HttpException, IOException {

        AuthState authState = (AuthState) context.getAttribute(HttpClientContext.TARGET_AUTH_STATE);