create project folders

spreadsheet/src/domain/Cell.java

@@ -0,0 +1,5 @@
+package domain;
+
+public class Cell {
+
+}

spreadsheet/src/fassade/Fassade.java

@@ -0,0 +1,5 @@
+package fassade;
+
+public class Fassade {
+
+}

spreadsheet/src/spreadsheet/app/Main.java

@@ -1,6 +1,6 @@
 package spreadsheet.app;
 
-public class App {
+public class Main {
 	public static void main(String... args) {
 		System.out.println("Hello World!");
 	}

spreadsheet/src/ui/App.java

@@ -0,0 +1,5 @@
+package ui;
+
+public class App {
+
+}