This is an example which should show you how to create a clan-stat for Clans.
To add Clans as an dependency of your maven project you need to add the following line of code
<repositories>
<repository>
<id>bungeecord-repo</id>
<url>https://oss.sonatype.org/content/repositories/snapshots</url>
</repository>
<repository>
<id>simonsators-repo</id>
<url>https://simonsator.de/repo</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>de.simonsator</groupId>
<artifactId>Clans</artifactId>
<version>0.9.9.36</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>de.simonsator</groupId>
<artifactId>BungeecordPartyAndFriends</artifactId>
<version>1.0.89</version>
<scope>provided</scope>
</dependency>
</dependencies>
To see how you are adding a clan stat you should view this example class.
The JavaDoc of this plugin can be found here.
If you want to see how it looks ingame, just download this example-plugin from here.