StatCollection (IDE warnings)

import java.util.Collection;
import java.util.Iterator;
import java.util.function.Supplier;

/**
 * Created by loadedanvils on 2/10/16.
 */
public class StatCollection<E> implements Collection<E> {

    private Collection<E> collection;

    public StatCollection(Supplier<Collection<E>> collectionFactory) {
        collection = collectionFactory.get();
    }


    @Override
    public int size() {
        return collection.size();
    }

    @Override
    public boolean isEmpty() {
        return collection.isEmpty();
    }

    @Override
    public boolean contains(Object o) {
        return collection.contains(o);
    }

    @Override
    public Iterator<E> iterator() {
        return collection.iterator();
    }

    @Override
    public Object[] toArray() {
        return collection.toArray();
    }

    @Override
    public <T> T[] toArray(T[] ts) {
        return collection.toArray(ts);
    }

    @Override
    public boolean add(E e) {
        return collection.add(e);
    }

    @Override
    public boolean remove(Object o) {
        return collection.remove(o);
    }

    @Override
    public boolean containsAll(Collection<?> collection) {
        return this.collection.containsAll(collection);
    }

    @Override
    public boolean addAll(Collection<? extends E> collection) {
        return this.collection.addAll(collection);
    }

    @Override
    public boolean removeAll(Collection<?> collection) {
        return this.collection.removeAll(collection);
    }

    @Override
    public boolean retainAll(Collection<?> collection) {
        return this.collection.retainAll(collection);
    }

    @Override
    public void clear() {
        collection.clear();
    }
}