BOM (bill of material) proper representation in a class

I need an expert advice on how to represent BOM concept in a class. So far in my application I had only one Equipment. But now there is a CR for BOMintegration. So i have to modify my existing Equipment class. How can I represent BOM child and parent relationship in proper way?

I have one suggestion.

class Equipment {

        List <Equipment> childEquipmentList;

        public void addChildEquipment(EREquipmentVO childObject) {
            if(null == childEquipmentList) childEquipmentList = new ArrayList<EREquipmentVO>();
            this.childEquipmentList.add(childObject);
        } 

        public List<EREquipmentVO> getChildEquipmentList() {
              return childEquipmentList;
        }

}

Want to know is there any other better way to implement BOM relationship in Equipment object.