Using scalamojo-maven-plugin

        
<project>
  ...
  <build>
    ...
    <plugins>
      ...
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-plugin-plugin</artifactId>
        <version>3.2</version>
        <configuration>
          <skipErrorNoDescriptorsFound>true</skipErrorNoDescriptorsFound>
          <extractors>
            <extractor>java-annotations-and-scaladoc</extractor>
          </extractors>
        </configuration>
        <executions>
          <execution>
            <goals>
              <goal>descriptor</goal>
              <goal>helpmojo</goal>
            </goals>
          </execution>
        </executions>
        <dependencies>
          <dependency>
            <groupId>net.adamcin</groupId>
            <artifactId>scalamojo-maven-plugin</artifactId>
            <version>1.1.0</version>
          </dependency>
        </dependencies>
      </plugin>
      ...
    </plugins>
    ...
  </build>
  ...
</project>
            
      

              
<project>
  ...
  <build>
    ...
    <plugins>
      ...
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-site-plugin</artifactId>
        <version>3.0</version>
        <configuration>
          ...
          <reportPlugins>
            ...
            <plugin>
              <groupId>net.adamcin</groupId>
              <artifactId>scalamojo-maven-plugin</artifactId>
              <version>1.1.0</version>
            </plugin>
            ...
          </reportPlugins>
          ...
        </configuration>
      </plugins>
    ...
  </build>
  ...
</project>