Added .gitignore and application frame class

src/dev/kske/minesweeper/Minesweeper.java

@@ -0,0 +1,47 @@
+package dev.kske.minesweeper;
+
+import java.awt.EventQueue;
+
+import javax.swing.JFrame;
+
+
+public class Minesweeper {
+
+	private JFrame mframe;
+
+	/**
+	 * Launch the application.
+	 */
+	public static void main(String[] args) {
+		EventQueue.invokeLater(new Runnable() {
+
+			public void run() {
+				try {
+					Minesweeper window = new Minesweeper();
+					window.mframe.setVisible(true);
+				} catch (Exception e) {
+					e.printStackTrace();
+				}
+			}
+		});
+	}
+
+	/**
+	 * Create the application.
+	 */
+	public Minesweeper() {
+		initialize();
+	}
+
+	/**
+	 * Initialize the contents of the frame.
+	 */
+	private void initialize() {
+		mframe = new JFrame();
+		mframe.setResizable(false);
+		mframe.setTitle("Minesweeper");
+		mframe.setBounds(100, 100, 450, 300);
+		mframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+	}
+
+}

src/module-info.java

@@ -0,0 +1,3 @@
+module Minesweeper {
+	requires java.desktop;
+}