/*
 * The MIT License
 *
 * Copyright 2016 Olavi Mustanoja.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.github.tilastokeskus.minotaurus;

import java.io.File;

/**
 * A central access point for the program's fixed resource paths.
 */
public class ResourceManager {
    
    private static final String PATH = ResourceManager.class
                                        .getProtectionDomain().getCodeSource()
                                        .getLocation().getPath();
    
    private static final String PLUGIN_PATH = "plugins/";

    public static String getPluginDirectoryPath() {
        return new File(PATH).getParentFile().getPath() + "/" + PLUGIN_PATH;
    }
    
}
/*
 * The MIT License
 *
 * Copyright 2016 Olavi Mustanoja.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.github.tilastokeskus.minotaurus;

import java.io.File;

/**
 * A central access point for the program's fixed resource paths.
 */
public class ResourceManager {
    
    private static final String PATH = ResourceManager.class
                                        .getProtectionDomain().getCodeSource()
                                        .getLocation().getPath();
    
    private static final String PLUGIN_PATH = "plugins/";

    public static String getPluginDirectoryPath() {
        return buildPath(PLUGIN_PATH);
    }
    
    private static String buildPath(String resource) {
        return new File(PATH).getParentFile().getPath() + "/" + resource;
    }
    
}

Update ResourceManager.java