How implement scala trait from package object as java interface?

I have a java maven project which has dependency to scala project. I try to implement scala trait in java. The trait is store in packge object, when I try to implement it project fallen with compile time error Here sources:

scala source:

package com.compile.error

package object dummies {
    trait BaseDummy {
        def name: String
    }
    trait ChildDummy extends BaseDummy{

    }
}

java source:

//Uncoment for compile error
public class WhantImplementScalaTrait  /*implements com.compile.error.dummies.package$ChildDummy*/ {
}

So how implement scala trait as java interface if it in package object?

Full sources you can download here.

UPDATED

The command

javap package$ChildDummy.class

Gets result:

public interface com.compile.error.dummies.package$ChildDummy extends com.compile.error.dummies.package$BaseDummy {
}    

Tried imports

• com.compile.error.dummies.package$.ChildDummy$Class
• com.compile.error.dummies.package$.ChildDummy
• com.compile.error.dummies.package$.MODULE$.ChildDummy$Class
• com.compile.error.dummies.package$.MODULE$.ChildDummy
• com.compile.error.dummies.package$ChildDummy
• com.compile.error.dummies.package$ChildDummy$Class