#358 Add future interface methods, remove exception throwing

- Create Utils class for a common implementation of md5/sha1
- Create "foolproof" way of getting the MessageDigest for md5 etc. (MessageDigestAlgorithm enum)
- Create description annotations to annotate algorithms with usage recommendation and salt type

src/main/java/fr/xephi/authme/events/PasswordEncryptionEvent.java

@@ -5,14 +5,10 @@ import org.bukkit.event.Event;
 import org.bukkit.event.HandlerList;
 
 /**
- * <p>
  * This event is called when we need to compare or get an hash password, for set
  * a custom EncryptionMethod
- * </p>
  *
  * @author Xephi59
- * @version $Revision: 1.0 $
- * @see fr.xephi.authme.security.crypts.EncryptionMethod
  */
 public class PasswordEncryptionEvent extends Event {
 
@@ -20,60 +16,29 @@ public class PasswordEncryptionEvent extends Event {
     private EncryptionMethod method = null;
     private String playerName = "";
 
-    /**
-     * Constructor for PasswordEncryptionEvent.
-     *
-     * @param method     EncryptionMethod
-     * @param playerName String
-     */
     public PasswordEncryptionEvent(EncryptionMethod method, String playerName) {
         super(false);
         this.method = method;
         this.playerName = playerName;
     }
 
-    /**
-     * Method getHandlerList.
-     *
-     * @return HandlerList
-     */
     public static HandlerList getHandlerList() {
         return handlers;
     }
 
-    /**
-     * Method getHandlers.
-     *
-     * @return HandlerList
-     */
     @Override
     public HandlerList getHandlers() {
         return handlers;
     }
 
-    /**
-     * Method getMethod.
-     *
-     * @return EncryptionMethod
-     */
     public EncryptionMethod getMethod() {
         return method;
     }
 
-    /**
-     * Method setMethod.
-     *
-     * @param method EncryptionMethod
-     */
     public void setMethod(EncryptionMethod method) {
         this.method = method;
     }
 
-    /**
-     * Method getPlayerName.
-     *
-     * @return String
-     */
     public String getPlayerName() {
         return playerName;
     }