Added doc and changed accessibility of support class.

src/main/java/ca/recrown/islandsurvivalcraft/caching/Cache.java

@@ -22,6 +22,13 @@ public class Cache<K, V> {
         this(1024);
     }
 
+    /**
+     * Sets the value with the respective associated key.
+     * If the addition of this value and key cause the cache to be bigger than its designated max size,
+     * It will remove one of the least used values in the cache to accomodate.
+     * @param key The key to associate with the value.
+     * @param value The value to store.
+     */
     public void set(K key, V value) {
         writeLock.lock();
         try {
@@ -62,6 +69,9 @@ public class Cache<K, V> {
         return value.value;
     }
 
+    /**
+     * Clears the cache of all values.
+     */
     public void clearCache() {
         writeLock.lock();
         try {

src/main/java/ca/recrown/islandsurvivalcraft/caching/UsageStack.java

@@ -2,7 +2,7 @@ package ca.recrown.islandsurvivalcraft.caching;
 
 import java.util.concurrent.locks.ReentrantLock;
 
-public class UsageStack<K, V> {
+class UsageStack<K, V> {
     private volatile CacheValue<K, V> first, last;
     private final ReentrantLock lock = new ReentrantLock();