Changer

public class Changer {
    private ArrayList<Change> changes;
    public Changer(){
        this.changes=new ArrayList<Change>();
    }
    public void addChange(Change change){
        this.changes.add(change);
    }
    public String change(String word){
        for (Change Change : changes) {
            word = Change.change(word);
        }
        return word;
    }
}