For the czml writer you will need to install it differently, because no maven repository exists, two methods can be used :
* You download the .jar and you install it directly. Let name the groupId `com.custom`, the artifactId `cesium` and the version iwll be `1.0`. You will need to add in the pom.xml the following lines to do so :
```xml
<dependency>
<groupId>com.custom</groupId>
<artifactId>cesium</artifactId>
<version>1.0</version>
</dependency>
```
Now that the dependency is added you can now use the following command in maven to install it :