<?xml version="1.0" encoding="UTF-8"?>
<actions>
        <action>
            <actionName>CUSTOM-Generate aggregated Javadoc jar</actionName>
            <displayName>Generate aggregated Javadoc jar</displayName>
            <goals>
                <goal>generate-sources</goal>
                <goal>javadoc:aggregate-jar</goal>
            </goals>
        </action>
        
    </actions>

Add custom action - create an aggregated javadoc jar
Add custom action - create an aggregated javadoc jar