added logger

src/de/miaurizius/jgame2d/tile/TileManager.java

@@ -1,10 +1,12 @@
 package de.miaurizius.jgame2d.tile;
 
+import de.miaurizius.jgame2d.core.Boot;
 import de.miaurizius.jgame2d.core.GamePanel;
 
 import javax.imageio.ImageIO;
 import java.awt.*;
 import java.io.*;
+import java.util.logging.Level;
 
 public class TileManager {
 
@@ -43,7 +45,7 @@ public class TileManager {
             tile[5] = new Tile();
             tile[5].image = ImageIO.read(new FileInputStream("assets/tiles/sand.png"));
         } catch (IOException e) {
-            e.printStackTrace();
+            Boot.logger.log(Level.SEVERE, "Could not load tile", e);
         }
     }
 
@@ -68,7 +70,7 @@ public class TileManager {
             }
             bReader.close();
         } catch(Exception e) {
-            e.printStackTrace();
+            Boot.logger.log(Level.SEVERE, "Could not load map", e);
         }
     }