A few typos in javdocs

src/main/java/com/gmail/nossr50/util/player/NotificationManager.java

@@ -26,7 +26,7 @@ import org.bukkit.entity.Player;
 public class NotificationManager {
     /**
      * Sends players notifications from mcMMO
-     * This does this by sending out an event so other plugins can cancel it
+     * Does so by sending out an event so other plugins can cancel it
      * @param player target player
      * @param notificationType notifications defined type
      * @param key the locale key for the notifications defined message

src/main/java/com/gmail/nossr50/util/random/RandomChanceUtil.java

@@ -28,7 +28,7 @@ public class RandomChanceUtil
      * @param skillActivationType this value represents what kind of activation procedures this sub-skill uses
      * @param subSkillType The identifier for this specific sub-skill
      * @param player The owner of this sub-skill
-     * @return returns true if all conditions are met and they event is not cancelled
+     * @return returns true if all conditions are met and the event is not cancelled
      */
     public static boolean isActivationSuccessful(SkillActivationType skillActivationType, SubSkillType subSkillType, Player player)
     {