Finalized some fields, removed redundant code, various other fixes

src/main/java/fr/xephi/authme/AuthMe.java

@@ -88,10 +88,10 @@ public class AuthMe extends JavaPlugin {
     public AuthMeInventoryPacketAdapter inventoryProtector;
     // Random data maps and stuff
     // TODO: Create Manager for this
-    public ConcurrentHashMap<String, BukkitTask> sessions = new ConcurrentHashMap<>();
-    public ConcurrentHashMap<String, Integer> captcha = new ConcurrentHashMap<>();
-    public ConcurrentHashMap<String, String> cap = new ConcurrentHashMap<>();
-    public ConcurrentHashMap<String, String> realIp = new ConcurrentHashMap<>();
+    public final ConcurrentHashMap<String, BukkitTask> sessions = new ConcurrentHashMap<>();
+    public final ConcurrentHashMap<String, Integer> captcha = new ConcurrentHashMap<>();
+    public final ConcurrentHashMap<String, String> cap = new ConcurrentHashMap<>();
+    public final ConcurrentHashMap<String, String> realIp = new ConcurrentHashMap<>();
     // AntiBot Status
     // TODO: Create Manager for this
     public boolean antiBotMod = false;

src/main/java/fr/xephi/authme/DataManager.java

@@ -18,7 +18,7 @@ import java.util.concurrent.Future;
  */
 public class DataManager {
 
-    public AuthMe plugin;
+    public final AuthMe plugin;
 
     /**
      * Constructor for DataManager.
@@ -29,9 +29,6 @@ public class DataManager {
         this.plugin = plugin;
     }
 
-    public void run() {
-    }
-
     /**
      * Method getOfflinePlayer.
      *

src/main/java/fr/xephi/authme/ImageGenerator.java

@@ -7,7 +7,7 @@ import java.awt.image.BufferedImage;
  */
 public class ImageGenerator {
 
-    private String pass;
+    private final String pass;
 
     /**
      * Constructor for ImageGenerator.

src/main/java/fr/xephi/authme/PerformBackup.java

@@ -14,13 +14,13 @@ import java.util.Date;
  */
 public class PerformBackup {
 
-    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd_HH-mm");
-    String dateString = format.format(new Date());
-    private String dbName = Settings.getMySQLDatabase;
-    private String dbUserName = Settings.getMySQLUsername;
-    private String dbPassword = Settings.getMySQLPassword;
-    private String tblname = Settings.getMySQLTablename;
-    private String path = AuthMe.getInstance().getDataFolder() + File.separator + "backups" + File.separator + "backup" + dateString;
+    final SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd_HH-mm");
+    final String dateString = format.format(new Date());
+    private final String dbName = Settings.getMySQLDatabase;
+    private final String dbUserName = Settings.getMySQLUsername;
+    private final String dbPassword = Settings.getMySQLPassword;
+    private final String tblname = Settings.getMySQLTablename;
+    private final String path = AuthMe.getInstance().getDataFolder() + File.separator + "backups" + File.separator + "backup" + dateString;
     private AuthMe instance;
 
     /**

src/main/java/fr/xephi/authme/SendMailSSL.java

@@ -16,7 +16,7 @@ import java.io.File;
  */
 public class SendMailSSL {
 
-    public AuthMe plugin;
+    public final AuthMe plugin;
 
     /**
      * Constructor for SendMailSSL.

src/main/java/fr/xephi/authme/api/NewAPI.java

@@ -19,7 +19,7 @@ import java.security.NoSuchAlgorithmException;
 public class NewAPI {
 
     public static NewAPI singleton;
-    public AuthMe plugin;
+    public final AuthMe plugin;
 
     /**
      * Constructor for NewAPI.

src/main/java/fr/xephi/authme/cache/auth/PlayerAuth.java

@@ -16,7 +16,7 @@ public class PlayerAuth {
     private double z;
     private String world;
     private String salt;
-    private int groupId;
+    private final int groupId;
     private String email;
     private String realName;
 

src/main/java/fr/xephi/authme/cache/auth/PlayerCache.java

@@ -7,7 +7,7 @@ import java.util.concurrent.ConcurrentHashMap;
 public class PlayerCache {
 
     private volatile static PlayerCache singleton;
-    private ConcurrentHashMap<String, PlayerAuth> cache;
+    private final ConcurrentHashMap<String, PlayerAuth> cache;
 
     private PlayerCache() {
         cache = new ConcurrentHashMap<>();

src/main/java/fr/xephi/authme/cache/backup/DataFileCache.java

@@ -4,9 +4,9 @@ package fr.xephi.authme.cache.backup;
  */
 public class DataFileCache {
 
-    private String group;
-    private boolean operator;
-    private boolean flying;
+    private final String group;
+    private final boolean operator;
+    private final boolean flying;
 
     /**
      * Constructor for DataFileCache.

src/main/java/fr/xephi/authme/cache/limbo/LimboCache.java

@@ -19,9 +19,9 @@ import java.util.concurrent.ConcurrentHashMap;
 public class LimboCache {
 
     private volatile static LimboCache singleton;
-    public ConcurrentHashMap<String, LimboPlayer> cache;
-    public AuthMe plugin;
-    private JsonCache playerData;
+    public final ConcurrentHashMap<String, LimboPlayer> cache;
+    public final AuthMe plugin;
+    private final JsonCache playerData;
 
     /**
      * Constructor for LimboCache.

src/main/java/fr/xephi/authme/cache/limbo/LimboPlayer.java

@@ -8,7 +8,7 @@ import org.bukkit.scheduler.BukkitTask;
  */
 public class LimboPlayer {
 
-    private String name;
+    private final String name;
     private Location loc = null;
     private BukkitTask timeoutTaskId = null;
     private BukkitTask messageTaskId = null;

src/main/java/fr/xephi/authme/command/CommandManager.java

@@ -20,7 +20,7 @@ public class CommandManager {
     /**
      * The list of commandDescriptions.
      */
-    private List<CommandDescription> commandDescriptions = new ArrayList<>();
+    private final List<CommandDescription> commandDescriptions = new ArrayList<>();
 
     /**
      * Constructor.

src/main/java/fr/xephi/authme/command/CommandParts.java

@@ -12,7 +12,7 @@ public class CommandParts {
     /**
      * The list of parts for this command.
      */
-    private List<String> parts = new ArrayList<>();
+    private final List<String> parts = new ArrayList<>();
 
     /**
      * Constructor.

src/main/java/fr/xephi/authme/command/FoundCommandResult.java

@@ -13,15 +13,15 @@ public class FoundCommandResult {
     /**
      * The command reference.
      */
-    private CommandParts commandReference;
+    private final CommandParts commandReference;
     /**
      * The command arguments.
      */
-    private CommandParts commandArguments;
+    private final CommandParts commandArguments;
     /**
      * The original search query reference.
      */
-    private CommandParts queryReference;
+    private final CommandParts queryReference;
 
     /**
      * Constructor.

src/main/java/fr/xephi/authme/command/executable/converter/ConverterCommand.java

@@ -90,7 +90,7 @@ public class ConverterCommand extends ExecutableCommand {
         vauth("vauth"),
         sqltoflat("sqltoflat");
 
-        String name;
+        final String name;
 
         /**
          * Constructor for ConvertType.

src/main/java/fr/xephi/authme/converter/CrazyLoginConverter.java

@@ -18,9 +18,9 @@ import java.io.IOException;
  */
 public class CrazyLoginConverter implements Converter {
 
-    public AuthMe instance;
-    public DataSource database;
-    public CommandSender sender;
+    public final AuthMe instance;
+    public final DataSource database;
+    public final CommandSender sender;
 
     /**
      * Constructor for CrazyLoginConverter.

src/main/java/fr/xephi/authme/converter/FlatToSqlite.java

@@ -14,7 +14,7 @@ import java.sql.*;
  */
 public class FlatToSqlite implements Converter {
 
-    public CommandSender sender;
+    public final CommandSender sender;
     private String tableName;
     private String columnName;
     private String columnPassword;

src/main/java/fr/xephi/authme/converter/ForceFlatToSqlite.java

@@ -11,7 +11,7 @@ import fr.xephi.authme.settings.Settings;
  */
 public class ForceFlatToSqlite implements Converter {
 
-    private DataSource data;
+    private final DataSource data;
 
     /**
      * Constructor for ForceFlatToSqlite.

src/main/java/fr/xephi/authme/converter/RakamakConverter.java

@@ -23,9 +23,9 @@ import java.util.Map.Entry;
  */
 public class RakamakConverter implements Converter {
 
-    public AuthMe instance;
-    public DataSource database;
-    public CommandSender sender;
+    public final AuthMe instance;
+    public final DataSource database;
+    public final CommandSender sender;
 
     /**
      * Constructor for RakamakConverter.

src/main/java/fr/xephi/authme/converter/RoyalAuthConverter.java

@@ -12,8 +12,8 @@ import java.io.File;
  */
 public class RoyalAuthConverter implements Converter {
 
-    public AuthMe plugin;
-    private DataSource data;
+    public final AuthMe plugin;
+    private final DataSource data;
 
     /**
      * Constructor for RoyalAuthConverter.

src/main/java/fr/xephi/authme/converter/SqlToFlat.java

@@ -14,9 +14,9 @@ import java.util.List;
  */
 public class SqlToFlat implements Converter {
 
-    public AuthMe plugin;
-    public DataSource database;
-    public CommandSender sender;
+    public final AuthMe plugin;
+    public final DataSource database;
+    public final CommandSender sender;
 
     /**
      * Constructor for SqlToFlat.

src/main/java/fr/xephi/authme/converter/vAuthConverter.java

@@ -9,9 +9,9 @@ import org.bukkit.command.CommandSender;
  */
 public class vAuthConverter implements Converter {
 
-    public AuthMe plugin;
-    public DataSource database;
-    public CommandSender sender;
+    public final AuthMe plugin;
+    public final DataSource database;
+    public final CommandSender sender;
 
     /**
      * Constructor for vAuthConverter.

src/main/java/fr/xephi/authme/converter/vAuthFileReader.java

@@ -17,9 +17,9 @@ import java.util.UUID;
  */
 public class vAuthFileReader {
 
-    public AuthMe plugin;
-    public DataSource database;
-    public CommandSender sender;
+    public final AuthMe plugin;
+    public final DataSource database;
+    public final CommandSender sender;
 
     /**
      * Constructor for vAuthFileReader.
@@ -38,7 +38,7 @@ public class vAuthFileReader {
      *
      * @throws IOException
      */
-    public void convert() throws IOException {
+    public void convert() {
         final File file = new File(plugin.getDataFolder().getParent() + "" + File.separator + "vAuth" + File.separator + "passwords.yml");
         Scanner scanner;
         try {

src/main/java/fr/xephi/authme/converter/xAuthConverter.java

@@ -7,8 +7,8 @@ import org.bukkit.command.CommandSender;
  */
 public class xAuthConverter implements Converter {
 
-    public AuthMe plugin;
-    public CommandSender sender;
+    public final AuthMe plugin;
+    public final CommandSender sender;
 
     /**
      * Constructor for xAuthConverter.

src/main/java/fr/xephi/authme/converter/xAuthToFlat.java

@@ -20,9 +20,9 @@ import java.util.List;
  */
 public class xAuthToFlat {
 
-    public AuthMe instance;
-    public DataSource database;
-    public CommandSender sender;
+    public final AuthMe instance;
+    public final DataSource database;
+    public final CommandSender sender;
 
     /**
      * Constructor for xAuthToFlat.

src/main/java/fr/xephi/authme/datasource/DatabaseCalls.java

@@ -13,7 +13,7 @@ import java.util.concurrent.Executors;
 public class DatabaseCalls implements DataSource {
 
     private final ExecutorService exec;
-    private DataSource database;
+    private final DataSource database;
 
     /**
      * Constructor for DatabaseCalls.

src/main/java/fr/xephi/authme/datasource/FlatFile.java

@@ -25,7 +25,7 @@ public class FlatFile implements DataSource {
      * :LASTPOSZ:LASTPOSWORLD PLAYERNAME:HASHSUM:IP:LOGININMILLIESECONDS
      * PLAYERNAME:HASHSUM:IP PLAYERNAME:HASHSUM
      */
-    private File source;
+    private final File source;
 
     public FlatFile() {
         source = Settings.AUTH_FILE;

src/main/java/fr/xephi/authme/datasource/MySQL.java

@@ -17,29 +17,29 @@ import java.util.List;
  */
 public class MySQL implements DataSource {
 
-    private String host;
-    private String port;
-    private String username;
-    private String password;
-    private String database;
-    private String tableName;
-    private String columnName;
-    private String columnPassword;
-    private String columnIp;
-    private String columnLastLogin;
-    private String columnSalt;
-    private String columnGroup;
-    private String lastlocX;
-    private String lastlocY;
-    private String lastlocZ;
-    private String lastlocWorld;
-    private String columnEmail;
-    private String columnID;
-    private String columnLogged;
-    private List<String> columnOthers;
+    private final String host;
+    private final String port;
+    private final String username;
+    private final String password;
+    private final String database;
+    private final String tableName;
+    private final String columnName;
+    private final String columnPassword;
+    private final String columnIp;
+    private final String columnLastLogin;
+    private final String columnSalt;
+    private final String columnGroup;
+    private final String lastlocX;
+    private final String lastlocY;
+    private final String lastlocZ;
+    private final String lastlocWorld;
+    private final String columnEmail;
+    private final String columnID;
+    private final String columnLogged;
+    private final List<String> columnOthers;
     private HikariDataSource ds;
-    private String columnRealName;
-    private int maxConnections;
+    private final String columnRealName;
+    private final int maxConnections;
 
     /**
      * Constructor for MySQL.
@@ -105,7 +105,7 @@ public class MySQL implements DataSource {
      * @throws ClassNotFoundException * @throws IllegalArgumentException
      */
     private synchronized void setConnectionArguments()
-        throws ClassNotFoundException, IllegalArgumentException {
+        throws IllegalArgumentException {
         HikariConfig config = new HikariConfig();
         config.setPoolName("AuthMeMYSQLPool");
         config.setDriverClassName("com.mysql.jdbc.Driver");

src/main/java/fr/xephi/authme/datasource/SQLite.java

@@ -12,23 +12,23 @@ import java.util.List;
  */
 public class SQLite implements DataSource {
 
-    private String database;
-    private String tableName;
-    private String columnName;
-    private String columnPassword;
-    private String columnIp;
-    private String columnLastLogin;
-    private String columnSalt;
-    private String columnGroup;
-    private String lastlocX;
-    private String lastlocY;
-    private String lastlocZ;
-    private String lastlocWorld;
-    private String columnEmail;
-    private String columnID;
+    private final String database;
+    private final String tableName;
+    private final String columnName;
+    private final String columnPassword;
+    private final String columnIp;
+    private final String columnLastLogin;
+    private final String columnSalt;
+    private final String columnGroup;
+    private final String lastlocX;
+    private final String lastlocY;
+    private final String lastlocZ;
+    private final String lastlocWorld;
+    private final String columnEmail;
+    private final String columnID;
     private Connection con;
-    private String columnLogged;
-    private String columnRealName;
+    private final String columnLogged;
+    private final String columnRealName;
 
     /**
      * Constructor for SQLite.

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

@@ -13,7 +13,7 @@ import org.bukkit.event.HandlerList;
 public class AuthMeAsyncPreLoginEvent extends Event {
 
     private static final HandlerList handlers = new HandlerList();
-    private Player player;
+    private final Player player;
     private boolean canLogin = true;
 
     /**

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

@@ -11,9 +11,9 @@ import org.bukkit.entity.Player;
  */
 public class AuthMeTeleportEvent extends CustomEvent {
 
-    private Player player;
+    private final Player player;
     private Location to;
-    private Location from;
+    private final Location from;
 
     /**
      * Constructor for AuthMeTeleportEvent.

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

@@ -11,9 +11,9 @@ import org.bukkit.entity.Player;
  */
 public class FirstSpawnTeleportEvent extends CustomEvent {
 
-    private Player player;
+    private final Player player;
     private Location to;
-    private Location from;
+    private final Location from;
 
     /**
      * Constructor for FirstSpawnTeleportEvent.

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

@@ -12,11 +12,11 @@ import org.bukkit.inventory.ItemStack;
  */
 public class ProtectInventoryEvent extends CustomEvent {
 
-    private ItemStack[] storedinventory;
-    private ItemStack[] storedarmor;
+    private final ItemStack[] storedinventory;
+    private final ItemStack[] storedarmor;
     private ItemStack[] emptyInventory = null;
     private ItemStack[] emptyArmor = null;
-    private Player player;
+    private final Player player;
 
     /**
      * Constructor for ProtectInventoryEvent.

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

@@ -12,9 +12,9 @@ import org.bukkit.entity.Player;
  */
 public class RegisterTeleportEvent extends CustomEvent {
 
-    private Player player;
+    private final Player player;
     private Location to;
-    private Location from;
+    private final Location from;
 
     /**
      * Constructor for RegisterTeleportEvent.

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

@@ -11,10 +11,10 @@ import org.bukkit.entity.Player;
  */
 public class SpawnTeleportEvent extends CustomEvent {
 
-    private Player player;
+    private final Player player;
     private Location to;
-    private Location from;
-    private boolean isAuthenticated;
+    private final Location from;
+    private final boolean isAuthenticated;
 
     /**
      * Constructor for SpawnTeleportEvent.

src/main/java/fr/xephi/authme/hooks/BungeeCordMessage.java

@@ -10,7 +10,7 @@ import org.bukkit.plugin.messaging.PluginMessageListener;
  */
 public class BungeeCordMessage implements PluginMessageListener {
 
-    public AuthMe plugin;
+    public final AuthMe plugin;
 
     /**
      * Constructor for BungeeCordMessage.

src/main/java/fr/xephi/authme/listener/AuthMeBlockListener.java

@@ -12,7 +12,7 @@ import org.bukkit.event.block.BlockPlaceEvent;
  */
 public class AuthMeBlockListener implements Listener {
 
-    public AuthMe instance;
+    public final AuthMe instance;
 
     /**
      * Constructor for AuthMeBlockListener.

src/main/java/fr/xephi/authme/listener/AuthMeEntityListener.java

@@ -20,7 +20,7 @@ public class AuthMeEntityListener implements Listener {
 
     private static Method getShooter;
     private static boolean shooterIsProjectileSource;
-    public AuthMe instance;
+    public final AuthMe instance;
 
     /**
      * Constructor for AuthMeEntityListener.

src/main/java/fr/xephi/authme/listener/AuthMePlayerListener.java

@@ -37,12 +37,12 @@ import java.util.regex.PatternSyntaxException;
  */
 public class AuthMePlayerListener implements Listener {
 
-    public static ConcurrentHashMap<String, GameMode> gameMode = new ConcurrentHashMap<>();
-    public static ConcurrentHashMap<String, String> joinMessage = new ConcurrentHashMap<>();
-    public static ConcurrentHashMap<String, Boolean> causeByAuthMe = new ConcurrentHashMap<>();
-    public AuthMe plugin;
-    private Messages m = Messages.getInstance();
-    private List<String> antibot = new ArrayList<>();
+    public static final ConcurrentHashMap<String, GameMode> gameMode = new ConcurrentHashMap<>();
+    public static final ConcurrentHashMap<String, String> joinMessage = new ConcurrentHashMap<>();
+    public static final ConcurrentHashMap<String, Boolean> causeByAuthMe = new ConcurrentHashMap<>();
+    public final AuthMe plugin;
+    private final Messages m = Messages.getInstance();
+    private final List<String> antibot = new ArrayList<>();
 
     /**
      * Constructor for AuthMePlayerListener.

src/main/java/fr/xephi/authme/listener/AuthMePlayerListener16.java

@@ -12,7 +12,7 @@ import org.bukkit.event.player.PlayerEditBookEvent;
  */
 public class AuthMePlayerListener16 implements Listener {
 
-    public AuthMe plugin;
+    public final AuthMe plugin;
 
     /**
      * Constructor for AuthMePlayerListener16.

src/main/java/fr/xephi/authme/listener/AuthMePlayerListener18.java

@@ -12,7 +12,7 @@ import org.bukkit.event.player.PlayerInteractAtEntityEvent;
  */
 public class AuthMePlayerListener18 implements Listener {
 
-    public AuthMe plugin;
+    public final AuthMe plugin;
 
     /**
      * Constructor for AuthMePlayerListener18.

src/main/java/fr/xephi/authme/listener/AuthMeServerListener.java

@@ -17,8 +17,8 @@ import org.bukkit.plugin.Plugin;
  */
 public class AuthMeServerListener implements Listener {
 
-    public AuthMe plugin;
-    private Messages m = Messages.getInstance();
+    public final AuthMe plugin;
+    private final Messages m = Messages.getInstance();
 
     /**
      * Constructor for AuthMeServerListener.

src/main/java/fr/xephi/authme/modules/ModuleManager.java

@@ -19,7 +19,7 @@ import java.util.jar.JarFile;
  */
 public class ModuleManager {
 
-    private List<Module> modules = new ArrayList<>();
+    private final List<Module> modules = new ArrayList<>();
 
     /**
      * Constructor for ModuleManager.

src/main/java/fr/xephi/authme/permission/PermissionsManager.java

@@ -47,11 +47,11 @@ public class PermissionsManager {
     /**
      * Server instance.
      */
-    private Server server;
+    private final Server server;
     /**
      * Plugin instance.
      */
-    private Plugin plugin;
+    private final Plugin plugin;
     /**
      * Logger instance.
      */
@@ -907,7 +907,7 @@ public class PermissionsManager {
         VAULT("Vault"),
         PERMISSIONS("Permissions");
 
-        public String name;
+        public final String name;
 
         /**
          * Constructor for PermissionsSystemType.

src/main/java/fr/xephi/authme/process/login/AsynchronousLogin.java

@@ -25,15 +25,15 @@ import java.util.List;
  */
 public class AsynchronousLogin {
 
-    private static RandomString rdm = new RandomString(Settings.captchaLength);
-    protected Player player;
-    protected String name;
-    protected String realName;
-    protected String password;
-    protected boolean forceLogin;
-    private AuthMe plugin;
-    private DataSource database;
-    private Messages m = Messages.getInstance();
+    private static final RandomString rdm = new RandomString(Settings.captchaLength);
+    protected final Player player;
+    protected final String name;
+    protected final String realName;
+    protected final String password;
+    protected final boolean forceLogin;
+    private final AuthMe plugin;
+    private final DataSource database;
+    private final Messages m = Messages.getInstance();
 
     /**
      * Constructor for AsynchronousLogin.

src/main/java/fr/xephi/authme/process/login/ProcessSyncronousPlayerLogin.java

@@ -24,14 +24,14 @@ import org.bukkit.potion.PotionEffectType;
  */
 public class ProcessSyncronousPlayerLogin implements Runnable {
 
-    private LimboPlayer limbo;
-    private Player player;
-    private String name;
-    private PlayerAuth auth;
-    private AuthMe plugin;
-    private DataSource database;
-    private PluginManager pm;
-    private JsonCache playerCache;
+    private final LimboPlayer limbo;
+    private final Player player;
+    private final String name;
+    private final PlayerAuth auth;
+    private final AuthMe plugin;
+    private final DataSource database;
+    private final PluginManager pm;
+    private final JsonCache playerCache;
 
     /**
      * Constructor for ProcessSyncronousPlayerLogin.

src/main/java/fr/xephi/authme/process/logout/AsynchronousLogout.java

@@ -15,12 +15,12 @@ import org.bukkit.scheduler.BukkitScheduler;
  */
 public class AsynchronousLogout {
 
-    protected Player player;
-    protected String name;
-    protected AuthMe plugin;
-    protected DataSource database;
+    protected final Player player;
+    protected final String name;
+    protected final AuthMe plugin;
+    protected final DataSource database;
     protected boolean canLogout = true;
-    private Messages m = Messages.getInstance();
+    private final Messages m = Messages.getInstance();
 
     /**
      * Constructor for AsynchronousLogout.

src/main/java/fr/xephi/authme/process/logout/ProcessSyncronousPlayerLogout.java

@@ -19,10 +19,10 @@ import org.bukkit.scheduler.BukkitTask;
  */
 public class ProcessSyncronousPlayerLogout implements Runnable {
 
-    protected Player player;
-    protected AuthMe plugin;
-    protected String name;
-    private Messages m = Messages.getInstance();
+    protected final Player player;
+    protected final AuthMe plugin;
+    protected final String name;
+    private final Messages m = Messages.getInstance();
 
     /**
      * Constructor for ProcessSyncronousPlayerLogout.

src/main/java/fr/xephi/authme/process/quit/AsynchronousQuit.java

@@ -18,10 +18,10 @@ import org.bukkit.scheduler.BukkitTask;
  */
 public class AsynchronousQuit {
 
-    protected AuthMe plugin;
-    protected DataSource database;
-    protected Player player;
-    private String name;
+    protected final AuthMe plugin;
+    protected final DataSource database;
+    protected final Player player;
+    private final String name;
     private boolean isOp = false;
     private boolean isFlying = false;
     private boolean needToChange = false;

src/main/java/fr/xephi/authme/process/quit/ProcessSyncronousPlayerQuit.java

@@ -9,11 +9,11 @@ import org.bukkit.entity.Player;
  */
 public class ProcessSyncronousPlayerQuit implements Runnable {
 
-    protected AuthMe plugin;
-    protected Player player;
-    protected boolean isOp;
-    protected boolean isFlying;
-    protected boolean needToChange;
+    protected final AuthMe plugin;
+    protected final Player player;
+    protected final boolean isOp;
+    protected final boolean isFlying;
+    protected final boolean needToChange;
 
     /**
      * Constructor for ProcessSyncronousPlayerQuit.

src/main/java/fr/xephi/authme/process/register/AsyncRegister.java

@@ -17,13 +17,13 @@ import java.util.Date;
  */
 public class AsyncRegister {
 
-    protected Player player;
-    protected String name;
-    protected String password;
+    protected final Player player;
+    protected final String name;
+    protected final String password;
     protected String email = "";
-    private AuthMe plugin;
-    private DataSource database;
-    private Messages m = Messages.getInstance();
+    private final AuthMe plugin;
+    private final DataSource database;
+    private final Messages m = Messages.getInstance();
 
     /**
      * Constructor for AsyncRegister.

src/main/java/fr/xephi/authme/process/register/ProcessSyncEmailRegister.java

@@ -17,10 +17,10 @@ import org.bukkit.scheduler.BukkitTask;
  */
 public class ProcessSyncEmailRegister implements Runnable {
 
-    protected Player player;
-    protected String name;
-    private AuthMe plugin;
-    private Messages m = Messages.getInstance();
+    protected final Player player;
+    protected final String name;
+    private final AuthMe plugin;
+    private final Messages m = Messages.getInstance();
 
     /**
      * Constructor for ProcessSyncEmailRegister.

src/main/java/fr/xephi/authme/process/register/ProcessSyncronousPasswordRegister.java

@@ -22,10 +22,10 @@ import org.bukkit.scheduler.BukkitTask;
  */
 public class ProcessSyncronousPasswordRegister implements Runnable {
 
-    protected Player player;
-    protected String name;
-    private AuthMe plugin;
-    private Messages m = Messages.getInstance();
+    protected final Player player;
+    protected final String name;
+    private final AuthMe plugin;
+    private final Messages m = Messages.getInstance();
 
     /**
      * Constructor for ProcessSyncronousPasswordRegister.

src/main/java/fr/xephi/authme/process/unregister/AsynchronousUnregister.java

@@ -24,13 +24,13 @@ import java.security.NoSuchAlgorithmException;
  */
 public class AsynchronousUnregister {
 
-    protected Player player;
-    protected String name;
-    protected String password;
-    protected boolean force;
-    private AuthMe plugin;
-    private Messages m = Messages.getInstance();
-    private JsonCache playerCache;
+    protected final Player player;
+    protected final String name;
+    protected final String password;
+    protected final boolean force;
+    private final AuthMe plugin;
+    private final Messages m = Messages.getInstance();
+    private final JsonCache playerCache;
 
     /**
      * Constructor for AsynchronousUnregister.

src/main/java/fr/xephi/authme/security/HashAlgorithm.java

@@ -35,7 +35,7 @@ public enum HashAlgorithm {
     SALTEDSHA512(fr.xephi.authme.security.crypts.SALTEDSHA512.class),
     CUSTOM(Null.class);
 
-    Class<?> classe;
+    final Class<?> classe;
 
     /**
      * Constructor for HashAlgorithm.

src/main/java/fr/xephi/authme/security/PasswordSecurity.java

@@ -18,8 +18,8 @@ import java.util.HashMap;
  */
 public class PasswordSecurity {
 
-    public static HashMap<String, String> userSalt = new HashMap<>();
-    private static SecureRandom rnd = new SecureRandom();
+    public static final HashMap<String, String> userSalt = new HashMap<>();
+    private static final SecureRandom rnd = new SecureRandom();
 
     /**
      * Method createSalt.
@@ -191,7 +191,7 @@ public class PasswordSecurity {
      * @return boolean * @throws NoSuchAlgorithmException
      */
     private static boolean compareWithAllEncryptionMethod(String password,
-                                                          String hash, String playerName) throws NoSuchAlgorithmException {
+                                                          String hash, String playerName) {
         for (HashAlgorithm algo : HashAlgorithm.values()) {
             if (algo != HashAlgorithm.CUSTOM) {
                 try {

src/main/java/fr/xephi/authme/security/crypts/PHPBB.java

@@ -15,7 +15,7 @@ import java.security.NoSuchAlgorithmException;
  */
 public class PHPBB implements EncryptionMethod {
 
-    private String itoa64 = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+    private final String itoa64 = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
 
     /**
      * Method md5.

src/main/java/fr/xephi/authme/security/crypts/WHIRLPOOL.java

@@ -86,8 +86,8 @@ public class WHIRLPOOL implements EncryptionMethod {
      */
     private static final String sbox = "\u1823\uc6E8\u87B8\u014F\u36A6\ud2F5\u796F\u9152" + "\u60Bc\u9B8E\uA30c\u7B35\u1dE0\ud7c2\u2E4B\uFE57" + "\u1577\u37E5\u9FF0\u4AdA\u58c9\u290A\uB1A0\u6B85" + "\uBd5d\u10F4\ucB3E\u0567\uE427\u418B\uA77d\u95d8" + "\uFBEE\u7c66\udd17\u479E\ucA2d\uBF07\uAd5A\u8333" + "\u6302\uAA71\uc819\u49d9\uF2E3\u5B88\u9A26\u32B0" + "\uE90F\ud580\uBEcd\u3448\uFF7A\u905F\u2068\u1AAE" + "\uB454\u9322\u64F1\u7312\u4008\uc3Ec\udBA1\u8d3d" + "\u9700\ucF2B\u7682\ud61B\uB5AF\u6A50\u45F3\u30EF" + "\u3F55\uA2EA\u65BA\u2Fc0\udE1c\uFd4d\u9275\u068A" + "\uB2E6\u0E1F\u62d4\uA896\uF9c5\u2559\u8472\u394c" + "\u5E78\u388c\ud1A5\uE261\uB321\u9c1E\u43c7\uFc04" + "\u5199\u6d0d\uFAdF\u7E24\u3BAB\ucE11\u8F4E\uB7EB" + "\u3c81\u94F7\uB913\u2cd3\uE76E\uc403\u5644\u7FA9" + "\u2ABB\uc153\udc0B\u9d6c\u3174\uF646\uAc89\u14E1" + "\u163A\u6909\u70B6\ud0Ed\ucc42\u98A4\u285c\uF886";
 
-    private static long[][] C = new long[8][256];
-    private static long[] rc = new long[R + 1];
+    private static final long[][] C = new long[8][256];
+    private static final long[] rc = new long[R + 1];
 
     static {
         for (int x = 0; x < 256; x++) {
@@ -135,12 +135,12 @@ public class WHIRLPOOL implements EncryptionMethod {
     /**
      * Global number of hashed bits (256-bit counter).
      */
-    protected byte[] bitLength = new byte[32];
+    protected final byte[] bitLength = new byte[32];
 
     /**
      * Buffer of data to hash.
      */
-    protected byte[] buffer = new byte[64];
+    protected final byte[] buffer = new byte[64];
 
     /**
      * Current number of bits on the buffer.
@@ -155,11 +155,11 @@ public class WHIRLPOOL implements EncryptionMethod {
     /**
      * The hashing state.
      */
-    protected long[] hash = new long[8];
-    protected long[] K = new long[8];
-    protected long[] L = new long[8];
-    protected long[] block = new long[8];
-    protected long[] state = new long[8];
+    protected final long[] hash = new long[8];
+    protected final long[] K = new long[8];
+    protected final long[] L = new long[8];
+    protected final long[] block = new long[8];
+    protected final long[] state = new long[8];
 
     public WHIRLPOOL() {
     }

src/main/java/fr/xephi/authme/security/crypts/WORDPRESS.java

@@ -11,7 +11,7 @@ import java.util.Arrays;
 public class WORDPRESS implements EncryptionMethod {
 
     private static final String itoa64 = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
-    private SecureRandom randomGen = new SecureRandom();
+    private final SecureRandom randomGen = new SecureRandom();
 
     /**
      * Method encode64.

src/main/java/fr/xephi/authme/security/pbkdf2/MacBasedPRF.java

@@ -46,7 +46,7 @@ public class MacBasedPRF implements PRF {
 
     protected int hLen;
 
-    protected String macAlgorithm;
+    protected final String macAlgorithm;
 
     /**
      * Create Mac-based Pseudo Random Function.

src/main/java/fr/xephi/authme/settings/CustomConfiguration.java

@@ -16,7 +16,7 @@ import java.nio.file.StandardCopyOption;
  */
 public abstract class CustomConfiguration extends YamlConfiguration {
 
-    private File configFile;
+    private final File configFile;
 
     /**
      * Constructor for CustomConfiguration.

src/main/java/fr/xephi/authme/task/MessageTask.java

@@ -11,10 +11,10 @@ import org.bukkit.scheduler.BukkitTask;
  */
 public class MessageTask implements Runnable {
 
-    private AuthMe plugin;
-    private String name;
-    private String[] msg;
-    private int interval;
+    private final AuthMe plugin;
+    private final String name;
+    private final String[] msg;
+    private final int interval;
 
     /**
      * Constructor for MessageTask.

src/main/java/fr/xephi/authme/task/TimeoutTask.java

@@ -10,10 +10,10 @@ import org.bukkit.entity.Player;
  */
 public class TimeoutTask implements Runnable {
 
-    private AuthMe plugin;
-    private String name;
-    private Messages m = Messages.getInstance();
-    private Player player;
+    private final AuthMe plugin;
+    private final String name;
+    private final Messages m = Messages.getInstance();
+    private final Player player;
 
     /**
      * Constructor for TimeoutTask.

src/main/java/fr/xephi/authme/util/Utils.java

@@ -31,7 +31,7 @@ import java.util.zip.GZIPInputStream;
  */
 public final class Utils {
 
-    public static AuthMe plugin;
+    public static final AuthMe plugin;
 
     private static boolean getOnlinePlayersIsCollection = false;
     private static Method getOnlinePlayers;