free opengl resources

app/src/main/java/chess/view/DDDrender/Renderer.java

@@ -2,6 +2,9 @@ package chess.view.DDDrender;
 
 import static org.lwjgl.opengl.GL11.GL_UNSIGNED_INT;
 
+import java.io.Closeable;
+import java.io.IOException;
+
 import org.joml.Matrix4f;
 import org.joml.Vector3f;
 import org.lwjgl.opengl.GL30;
@@ -11,7 +14,7 @@ import chess.view.DDDrender.shader.BoardShader;
 import chess.view.DDDrender.shader.PieceShader;
 import chess.view.DDDrender.shader.ShaderProgram;
 
-public class Renderer {
+public class Renderer implements Closeable{
 	private BoardShader boardShader;
 	private PieceShader pieceShader;
 
@@ -56,4 +59,10 @@ public class Renderer {
 	public BoardShader getBoardShader() {
 		return boardShader;
 	}
+
+	@Override
+	public void close() throws IOException {
+		this.boardShader.close();
+		this.pieceShader.close();
+	}
 }