Add a lot of comments. More to come.

src/org/nwapw/abacus/lexing/pattern/Match.java

@@ -1,25 +1,56 @@
 package org.nwapw.abacus.lexing.pattern;
 
+/**
+ * A match that has been generated by the lexer.
+ * @param <T> the type used to represent the ID of the pattern this match belongs to.
+ */
 public class Match<T> {
 
+    /**
+     * The bottom range of the string, inclusive.
+     */
     private int from;
+    /**
+     * The top range of the string, exclusive.
+     */
     private int to;
+    /**
+     * The pattern type this match matched.
+     */
     private T type;
 
+    /**
+     * Creates a new match with the given parameters.
+     * @param from the bottom range of the string.
+     * @param to the top range of the string.
+     * @param type the type of the match.
+     */
     public Match(int from, int to, T type){
         this.from = from;
         this.to = to;
         this.type = type;
     }
 
+    /**
+     * Gets the bottom range bound of the string.
+     * @return the bottom range bound of the string.
+     */
     public int getFrom() {
         return from;
     }
 
+    /**
+     * Gets the top range bound of the string.
+     * @return the top range bound of the string.
+     */
     public int getTo() {
         return to;
     }
 
+    /**
+     * Gets the pattern type of the node.
+     * @return the ID of the pattern that this match matched.
+     */
     public T getType() {
         return type;
     }