Maven archetype package construction - maven

Question

I created my own archetype which has a custom pom.xml and a custom class in a package like this: ${groupId}.${artifactId}.core
The problem is at package. When I create a maven project with my archetype the package it is not like ${groupId}.${artifactId}.core. It is only ${groupId}.
This is the generated class by archetype:
But the tree is like this (package is not builded how I want):
Why my project is not builded how I expect and how I done this?
Here is the tree of project from where I generate archetype
MainCore.java
package ${package}.core;
import fl.raul.libs.methods.Common;
public class MainCore{
public static void main(String[] args){
//REMINDER : update version of fl.raul.libs - if needed.
Common.testLibrary();
}
}
archetype.xml
<archetype xmlns="http://maven.apache.org/plugins/maven-archetype-plugin/archetype/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/plugins/maven-archetype-plugin/archetype/1.0.0 http://maven.apache.org/xsd/archetype-1.0.0.xsd">
<id>libs-archetype</id>
<sources>
<source>src/main/java/core/MainCore.java</source>
</sources>
<allowPartial>true</allowPartial>
</archetype>
P.S.: I think it is something from Intellij. I tested this archetype in Eclipse and package is how it should be (fl.raul.testers.core).

Answer 1

Please move the file into correct folder (core) and adjust archetype.xml, I think that is what breaks the default behavior, here.
Alternatively to package ${groupId}.${artifactId}.core you can use package ${package}.core;.
${package} property can be provided on archetype generation and defaults (if omit) to ${groupId}.${artifactId}.
Please also refer to this "nice answer" & "wider scope question":
https://stackoverflow.com/a/39251046/592355