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Newsletter Inverse

 
Bartender
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OK, thinking about the June newletter / wordfind problem got me thinking about the inverse. What algortihm can be used to hide words in a grid?
a). Write a program to hide a list of words in a grid. The program should take a list of words and a grid size (through any input means you want), and produce as output a grid with those words hidden in it. Exceptions can be handled any way you see fit (you can't hide "redneck" in a 2x2 grid...). non-used spaces in the grid should be filled with random characters.
b). This is the same as (a), except that instead of a grid size and random-characters, the program uses a string of characters to fill in the empty spaces (usually a quote with spaces removed), thereby producing a "true" word seek puzzle. (Good word seek solvers always look at the left over letters to see what they spell.)

(Ulterior motive: I want to test the newsletter soltutions with different word grids, but I'm too lazy to come up with my own grid... )
 
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I didn't even see this post before I posted in the other thread! Here's my solution to part a. Part b is not accounted for though I'm afraid.
Start with an empty char[][].
Sort the word list by length, with the longer words first in the list, the idea being that it's easier to insert the longer words in as empty a grid as possible.
For each word {
Obtain a random empty grid space.
Obtain a random direction.
If the word will not fit (that is each letter must either fall across an empty space or a space containing the same letter) in that direction, try all the other directions until a fit is found.
If the word will not fit in any orientation in this grid space, get the next empty grid space and repeat the process.
}
Fill all remaining empty spaces with a random character.
Here's my code, including the GridReference class I used for WordFinder.
WordSearchMaker.java

GridReference.java
 
I hired a bunch of ninjas. The fridge is empty, but I can't find them to tell them the mission.
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