Fejl ved init af Scanner med en fil som parameter

Kode 

ERROR
Exception in thread "main" java.lang.NullPointerException
	at Main.putInHashMap(Main.java:26)
	at Main.main(Main.java:44)

Java kode 

 file = new Scanner(new File(fileName));

Java kode 

 import java.awt.Color;
 import java.awt.geom.Rectangle2D;
 import java.io.*;
 import java.lang.*;
 import java.util.*;
 
 public class Main
 {
     private static Scanner file;
     private static HashMap<String, String> config = new HashMap<String, String>(); // Key/Value
     
     public static void openFile(String fileName)
     {
         try
         {
             file = new Scanner(new File(fileName));
         }
         catch(Exception e)
         {
             System.out.println("ERROR");
         }
     }
     
     public static void putInHashMap(Scanner f)
     {
         while(f.hasNext())
         {
             String temp, key, value;
             temp = f.nextLine();
             temp.trim();
             
             int a = temp.indexOf(':');
             String[] keyAndValue = temp.split(":");
             key = keyAndValue[0];
             value = keyAndValue[1];
             
             config.put(keyAndValue[0], keyAndValue[1]);
         }
     }
     
     public static void main(String args[])
     {
         openFile("/Test.txt");
         putInHashMap(file);
         
         System.out.println(config.keySet());
         System.out.println(config.get("HP"));
         System.out.println(config.get("MANA"));
         System.out.println(config.get("AD"));
     }
 }