private void createSupplyProductList() {
		productList = new ArrayList<ArrayList<Product>>();
		ArrayList<Product> list;
		for (Person supplier : getPersonDB().getSupplierList()) {
			list = new ArrayList<Product>();
			for (StockItem stockItem : getStockDB().getStockList()) {
				Product product = stockItem.getProduct();
				if (product.getSupplier().equals(supplier)) {
					list.add(product);
				}
			}
			productList.add(list);
		}
	}