Added file structure and first gui implementation

src/main/java/gui/Gui.java

@@ -0,0 +1,19 @@
+package gui;
+
+import javax.swing.JFrame;
+
+
+public class Gui {
+	public static void main(String[] args) {
+		JFrame jf = new JFrame();
+
+		jf.setTitle("Travel Buddy");
+		jf.setSize(400, 300);
+		jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+
+
+		jf.setVisible(true);
+	}
+
+
+}