Added: Javadoc for Item Methods + minor refactoring

projjpn/src/main/java/de/hs_fulda/ciip/projjpn/Item.java

@@ -46,13 +46,20 @@ public class Item {
 		return availability;
 	}
 	
+	/**
+	 * 
+	 * @param newAmount of items
+	 */
 	public void updateAvailability(int newAmount) {
 		availability = newAmount;
 	}
 	
-	
-	public void updatePrice(float price) {
-		this.price = price;
+	/**
+	 * 
+	 * @param newPrice of this item.
+	 */
+	public void updatePrice(float newPrice) {
+		this.price = newPrice;
 	}
 	
 	public float getCurrentPrice() {