Apache HttpClient overriding socket creation

SocketMain.java

package shams;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.params.ClientPNames;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.ClientConnectionManagerFactory;
import org.apache.http.conn.ConnectTimeoutException;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.scheme.SchemeSocketFactory;
import org.apache.http.conn.scheme.SocketFactory;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.BasicClientConnectionManager;
import org.apache.http.impl.conn.SchemeRegistryFactory;
import org.apache.http.params.HttpParams;

import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.List;

/**
 * @author Shams Imam
 */

public class SocketMain {

    public static SchemeSocketFactory wrapSocketFactory(SchemeSocketFactory innerSocketFactory) {
        return new SchemeSocketFactory() {
            @Override
            public Socket createSocket(HttpParams params) throws IOException {
                Socket socket = innerSocketFactory.createSocket(params);
                socket.setKeepAlive(true);
                return socket;
            }

            @Override
            public Socket connectSocket(Socket sock, InetSocketAddress remoteAddress, InetSocketAddress localAddress, HttpParams params) throws IOException {
                Socket socket = innerSocketFactory.connectSocket(sock, remoteAddress, localAddress, params);
                socket.setKeepAlive(true);
                return socket;
            }

            @Override
            public boolean isSecure(Socket sock) throws IllegalArgumentException {
                return innerSocketFactory.isSecure(sock);
            }
        };
    }

    public static void main(String[] args) throws IOException {

        System.out.println("SocketMain.main: Creating client");
        HttpClient client = new DefaultHttpClient() {
            protected ClientConnectionManager createClientConnectionManager() {
                ClientConnectionManager connManager = super.createClientConnectionManager();
                final SchemeRegistry registry = connManager.getSchemeRegistry();
                final List<String> schemeNames = registry.getSchemeNames();
                for (String schemeName : schemeNames) {
                    final Scheme scheme = registry.getScheme(schemeName);
                    final Scheme newScheme =
                        new Scheme(schemeName,
                            scheme.getDefaultPort(),
                            wrapSocketFactory(scheme.getSchemeSocketFactory()));
                    registry.register(newScheme);
                }
                return connManager;
            }
        };
        System.out.println("SocketMain.main: Opening connection");
        HttpGet request = new HttpGet("http://www.google.com");
        System.out.println("SocketMain.main: Awaiting response code");
        HttpResponse response = client.execute(request);
        final int responseCode = response.getStatusLine().getStatusCode();
        System.out.println("SocketMain.main: Response code = " + responseCode);
        response.getEntity().getContent().close();
    }
}