src/main/java/ReportGenerator.java

@@ -10,10 +10,10 @@ public class ReportGenerator {
     private final String ordersFilePath;
     private final List<Product> productList;
 
-    private double totalFinalCost;
-    private int totalQuantity;
-    private double totalDiscountValue;
-    private int totalInvalidLines;
+    private double totalFinalCost = 0;
+    private int totalQuantity = 0;
+    private double totalDiscountValue = 0;
+    private int totalInvalidLines = 0;
 
     public ReportGenerator(String ordersFilePath, List<Product> productList) {
         this.ordersFilePath = ordersFilePath;
@@ -22,12 +22,10 @@ public class ReportGenerator {
 
     public void processFile()
     {
-        Scanner scanner = null;
-
-        try {
 
         File file = new File(ordersFilePath);
-            scanner = new Scanner(file);
+
+        try (Scanner scanner = new Scanner(file)){
 
             while (scanner.hasNextLine()) {
 
@@ -76,10 +74,6 @@ public class ReportGenerator {
             System.out.println("File not found: " + ordersFilePath);
         }
 
-        if (scanner != null) {
-            scanner.close();
-        }
-
     }
 
     public void saveReport()