feat: asset manager

app/src/main/java/chess/view/simplerender/Window.java

@@ -4,6 +4,7 @@ import java.awt.Color;
 import java.awt.GridLayout;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
+import java.io.IOException;
 import java.util.List;
 
 import javax.swing.JButton;
@@ -127,7 +128,11 @@ public class Window extends JFrame implements OutputSystem {
 		for (int y = 0; y < 8; y++) {
 			for (int x = 0; x < 8; x++) {
 				JLabel cell = this.cells[x][y];
-				cell.setIcon(pieceIcon.getIcon(pieceAt(x, y)));
+				try {
+					cell.setIcon(pieceIcon.getIcon(pieceAt(x, y)));
+				} catch (IOException e) {
+					e.printStackTrace();
+				}
 			}
 		}
 	}