Wildfly 14 - explicit dependencies

Question

I have two EAR (ear01-0.0.1-SNAPSHOT.ear, ear02-0.0.1-SNAPSHOT.ear) applications and both of them are useing a common library (common-0.0.1-SNAPSHOT.jar). I decided to move out that common part and add it as module to a Wildfly 14 but even with a deployment descritor I get exception during the EAR deployment:

java.lang.NoClassDefFoundError: Failed to link ki/wildfly_deps/ejbs01/EchoBean01

I used this CLI to add the new module:

module add --name=ki.wildfly_deps.common --resources=common-0.0.1-SNAPSHOT.jar

and the JAR now is in

$JBOSS_HOME/modules/ki/wildfly_deps/common/main

1. QUESTION

This JAR shouldn't be in folder

$JBOSS_HOME/modules/system/layers/base/ki/wildfly_deps/common/main

beside the other modules?

After adding the module, the module.xml look like this:

<?xml version='1.0' encoding='UTF-8'?>
<module xmlns="urn:jboss:module:1.1" name="ki.wildfly_deps.common">
    <resources>
        <resource-root path="common-0.0.1-SNAPSHOT.jar"/>
    </resources>
</module>

The jboss-deployment-structure.xml from each EAR declares a dependency on the above common library:

<jboss-deployment-structure xmlns="urn:jboss:deployment-structure:1.2"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<deployment>
    <dependencies>
        <module name="ki.wildfly_deps.common" />
    </dependencies>
</deployment>

2. QUESTION

Should I specify the package what must be imported from the common module?

<jboss-deployment-structure
xmlns="urn:jboss:deployment-structure:1.2"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<deployment>
    <dependencies>
        <module name="ki.wildfly_deps.common" //>
            <imports>
                <include path="META-INF**" />
                <include path="ki.wildfly_deps.common**" />
            </imports>
        </module>
    </dependencies>
</deployment>