HERE IS A SKETCH OF HOW TO DO WRITE JUST ENOUGH TO VERIFY YOU ARE CORRECTLY GENERATING
ALL POSSIBLE WORDS FROM THE BOGGLE GRID.

Above main declare a static long int numWordsFormed=0;
and you can declare your board there too
String[][] board;

In main do multiple calls to dfs
	board = loadBoard(..) or something like this
	// starting with EVERY letter of board, form all strings from it
	for every cell [r,c] in the boggle board
		call DFS(r,c, ""); 
	println numWordsFormed;

Below main write your DFS that only forms and counts wordsformed. 
Don't search dictionary or do hueristics until you have verified 
correctness of the words/count generated.

DFS( , int r, int c, String word )
{
	tack the letter at [r][c] onto the end of your incoming word
	println( word ); // you wont want to do this for grids >= 4
	++numWordsFormed;

	if NORTH's indices [r-1][c] are not out of bounds AND letter at [r-1][c] is unmarked
		mark the letter at r,c
		recurse passing in coords of N (relative to current r,c and the word )
		unmark letter at r,c
	if NE ...
	if E  ...
	if SE ...
	if S  ...
	if SW ...
	if W  ...
	if NW ...
}