diff --git a/app/src/main/java/sudoku/App.java b/app/src/main/java/sudoku/App.java
new file mode 100644
index 0000000..6aa33d4
--- /dev/null
+++ b/app/src/main/java/sudoku/App.java
@@ -0,0 +1,14 @@
+/*
+ * This Java source file was generated by the Gradle 'init' task.
+ */
+package sudoku;
+
+public class App {
+    public String getGreeting() {
+        return "Hello World!";
+    }
+
+    public static void main(String[] args) {
+        System.out.println(new App().getGreeting());
+    }
+}
diff --git a/app/src/main/java/sudoku/Solver.java b/app/src/main/java/sudoku/Solver.java
deleted file mode 100644
index bfc1d7c..0000000
--- a/app/src/main/java/sudoku/Solver.java
+++ /dev/null
@@ -1,32 +0,0 @@
-package sudoku;
-
-public class Solver implements SudokuSolver {
-    private int[][] board;
-
-    public Solver() {
-        board = new int[9][9];
-    }
-
-    public void setBoard(int[][] board) {
-        this.board = board;
-    }
-
-    public int[][] getBoard() {
-        return board;
-    }
-
-    public boolean solve() {
-    }
-
-    public Boolean isSolved() {
-    }
-
-    private boolean solve(int row, int col) {
-    }
-
-    public boolean legal(int row, int col, int nbr) {
-    }
-
-    public String toString() {
-    }
-}
\ No newline at end of file
diff --git a/app/src/main/java/sudoku/SolverMain.java b/app/src/main/java/sudoku/SolverMain.java
deleted file mode 100644
index 76acdf9..0000000
--- a/app/src/main/java/sudoku/SolverMain.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package sudoku;
-
-public class SolverMain {
-    public static void main(String[] args) {
-        System.out.println("Hello world!");
-    }
-}
diff --git a/app/src/main/java/sudoku/SudokuSolver.java b/app/src/main/java/sudoku/SudokuSolver.java
index 2500328..8f33998 100644
--- a/app/src/main/java/sudoku/SudokuSolver.java
+++ b/app/src/main/java/sudoku/SudokuSolver.java
@@ -1,11 +1,14 @@
 package sudoku;
 
-public interface SudokuSolver {
+public interface SudokuSolver{
+    
+    // Work in progress
+
     /**
-     * Set sudoku board, numbers 1-9 are fixed values, 0 is unsolved.
+     * Set sudoku board, numbers 1-9 are fixed values, 0 is unsolved. 
      */
     void setBoard(int[][] board);
-
+    
     /**
      * Get the sudoku board
      */
@@ -13,14 +16,12 @@ public interface SudokuSolver {
 
     /**
      * Solve soduko
-     * 
      * @return true if solution could be found
      */
     boolean solve();
 
     /**
      * Check if digit is legal on the current board
-     * 
      * @param row
      * @param col
      * @param nbr
diff --git a/app/src/test/java/sudoku/AppTest.java b/app/src/test/java/sudoku/AppTest.java
new file mode 100644
index 0000000..d687b40
--- /dev/null
+++ b/app/src/test/java/sudoku/AppTest.java
@@ -0,0 +1,14 @@
+/*
+ * This Java source file was generated by the Gradle 'init' task.
+ */
+package sudoku;
+
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.*;
+
+class AppTest {
+    @Test void appHasAGreeting() {
+        App classUnderTest = new App();
+        assertNotNull(classUnderTest.getGreeting(), "app should have a greeting");
+    }
+}
diff --git a/app/src/test/java/sudoku/SolverTest.java b/app/src/test/java/sudoku/SolverTest.java
deleted file mode 100644
index ae16b4b..0000000
--- a/app/src/test/java/sudoku/SolverTest.java
+++ /dev/null
@@ -1,12 +0,0 @@
-package sudoku;
-
-import org.junit.jupiter.api.Test;
-import static org.junit.jupiter.api.Assertions.*;
-
-class SolverTest {
-    @Test void boardTest() {
-        Solver solver = new Solver();
-        solver.solve();
-        assertTrue(solver.isSolved());
-    }
-}