added WindowBuilder test file

src/xs_ibdpcompsci_javaintro/WindowBuilder_Test.java

@@ -0,0 +1,19 @@
+/**
+ * 
+ */
+package xs_ibdpcompsci_javaintro;
+
+/**
+ * 
+ */
+public class WindowBuilder_Test {
+
+	/**
+	 * @param args
+	 */
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+
+	}
+
+}