Documentation now passes the gradle doctest

app/src/main/java/sudoku/SudokuSolver.java

@@ -1,5 +1,6 @@
 package sudoku;
 
+/** SudokuSolver is an interface for implementing Sudoku solvers */
 public interface SudokuSolver {
     /**
      * Set sudoku board, numbers 1-9 are fixed values, 0 is unsolved.
@@ -7,10 +8,12 @@ public interface SudokuSolver {
      * @param board a board to copy values from
      * @throws IllegalArgumentException if board is invalid, e.g. not 9x9
      */
-    void setBoard(int[][] board) throws IllegalArgumentException;
+    void setBoard(int[][] board) throws IllegalArgumentException, NullPointerException;
 
     /**
      * Get a copy of the sudoku board
+     * 
+     * @return a <b>copy</b> of the sudoku board
      */
     int[][] getBoard();
 
@@ -24,9 +27,9 @@ public interface SudokuSolver {
     /**
      * Check if digit is legal on the current board
      * 
-     * @param row
-     * @param col
-     * @param nbr
+     * @param row row
+     * @param col column
+     * @param nbr number to check
      * @return true if legal
      */
     boolean isLegal(int row, int col, int nbr);
@@ -34,8 +37,8 @@ public interface SudokuSolver {
     /**
      * Get number on board
      * 
-     * @param row
-     * @param col
+     * @param row row
+     * @param col column
      * @return number on board
      */
     int get(int row, int col);
@@ -43,9 +46,9 @@ public interface SudokuSolver {
     /**
      * Set number on board, numbers 1-9 are fixed values, 0 is unsolved.
      * 
-     * @param row
-     * @param col
-     * @param nbr
+     * @param row row
+     * @param col column
+     * @param nbr number to set
      */
     void set(int row, int col, int nbr);