/*
 * (C) Copyright 2015 Boni Garcia (http://bonigarcia.github.io/)
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser General Public License
 * (LGPL) version 2.1 which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/lgpl-2.1.html
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 */
package io.github.bonigarcia.wdm;

import static java.util.Arrays.asList;
import static java.util.Collections.emptyList;

import java.io.IOException;
import java.net.URL;
import java.util.List;

/**
 * Void manager.
 *
 * @author Boni Garcia (boni.gg@gmail.com)
 * @since 1.3.1
 */
public class VoidDriverManager extends BrowserManager {

    public static synchronized BrowserManager getInstance() {
        if (instance == null
                || !instance.getClass().equals(VoidDriverManager.class)) {
            instance = new VoidDriverManager();
        }
        return instance;
    }

    public VoidDriverManager() {
        exportParameter = "";
        driverVersionKey = "";
        driverUrlKey = "";
        driverName = asList("");
    }

    @Override
    protected List<URL> getDrivers() throws IOException {
        return emptyList();
    }

}

/*
 * (C) Copyright 2015 Boni Garcia (http://bonigarcia.github.io/)
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser General Public License
 * (LGPL) version 2.1 which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/lgpl-2.1.html
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 */
package io.github.bonigarcia.wdm;

import static java.util.Arrays.asList;
import static java.util.Collections.emptyList;

import java.io.IOException;
import java.net.URL;
import java.util.List;

/**
 * Void manager.
 *
 * @author Boni Garcia (boni.gg@gmail.com)
 * @since 1.3.1
 */
public class VoidDriverManager extends BrowserManager {

    public VoidDriverManager() {
        exportParameter = "";
        driverVersionKey = "";
        driverUrlKey = "";
        driverName = asList("");
    }

    @Override
    protected List<URL> getDrivers() throws IOException {
        return emptyList();
    }

}

Remove non used method in void driver manager
Remove non used method in void driver manager
