Tools can generate wrapper classes for simple feature types defined in TypeSafe Config files. Your config files should be under src/main/resources. Add the following snippet to your pom, specifying the package you would like the generated class to reside in:
<build>
...
<plugins>
...
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.3.2</version>
<executions>
<execution>
<id>generate-sft-wrappers</id>
<phase>generate-sources</phase>
<goals>
<goal>java</goal>
</goals>
<configuration>
<mainClass>org.locationtech.geomesa.utils.geotools.GenerateFeatureWrappers</mainClass>
<cleanupDaemonThreads>false</cleanupDaemonThreads>
<killAfter>-1</killAfter>
<arguments>
<argument>${project.basedir}</argument>
<argument>org.foo.mypackage</argument>
</arguments>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>