API tutorial

Maven repository

    <dependencies>
        <dependency>
            <groupId>de.erethon</groupId>
            <artifactId>holographicmenus</artifactId>
            <version>2.0</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
...
    <repositories>
        <repository>
            <id>dre-repo</id>
            <url>http://erethon.de/repo/</url>
        </repository>
    </repositories>

An example plugin can be found here.