Fixed some code smells

src/main/java/world/bentobox/bentobox/api/commands/admin/DefaultAdminCommand.java

@@ -1,6 +1,5 @@
 package world.bentobox.bentobox.api.commands.admin;
 
-
 import java.util.List;
 
 import world.bentobox.bentobox.api.addons.GameModeAddon;
@@ -17,36 +16,31 @@ import world.bentobox.bentobox.api.commands.admin.team.AdminTeamSetownerCommand;
 import world.bentobox.bentobox.api.localization.TextVariables;
 import world.bentobox.bentobox.api.user.User;
 
-
 /**
  * This is default Admin command for console and op. It contains all necessary parts that
  * for main command.
  * @since 1.13.0
  * @author BONNe
  */
-public abstract class DefaultAdminCommand extends CompositeCommand
+public abstract class DefaultAdminCommand extends CompositeCommand {
-{
     /**
      * This is the top-level command constructor for commands that have no parent.
      *
      * @param addon   - GameMode addon
      */
-    public DefaultAdminCommand(GameModeAddon addon)
+    public DefaultAdminCommand(GameModeAddon addon) {
-    {
         // Register command with alias from config.
         super(addon,
             addon.getWorldSettings().getAdminCommandAliases().split(" ")[0],
             addon.getWorldSettings().getAdminCommandAliases().split(" "));
     }
 
-
     /**
      * Setups anything that is necessary for default main admin command.
      * @see world.bentobox.bentobox.api.commands.BentoBoxCommand#setup()
      */
     @Override
-    public void setup()
+    public void setup() {
-    {
         this.setPermission("admin.*");
         this.setOnlyPlayer(false);
 
@@ -88,10 +82,6 @@ public abstract class DefaultAdminCommand extends CompositeCommand
         new AdminSetSpawnPointCommand(this);
         // Reset flags
         new AdminResetFlagsCommand(this);
-        // Trash
-        //new AdminTrashCommand(this);
-        //new AdminEmptyTrashCommand(this);
-        //new AdminSwitchtoCommand(this);
         // Switch
         new AdminSwitchCommand(this);
         // Purge
@@ -100,16 +90,13 @@ public abstract class DefaultAdminCommand extends CompositeCommand
         new AdminSettingsCommand(this);
     }
 
-
     /**
      * Defines what will be executed when this command is run.
      * @see world.bentobox.bentobox.api.commands.BentoBoxCommand#execute(User, String, List<String>)
      */
     @Override
-    public boolean execute(User user, String label, List<String> args)
+    public boolean execute(User user, String label, List<String> args) {
-    {
+        if (user != null && !args.isEmpty()) {
-        if (user != null && !args.isEmpty())
-        {
             user.sendMessage("general.errors.unknown-command", TextVariables.LABEL, getTopLabel());
             return false;
         }

src/main/java/world/bentobox/bentobox/database/json/JSONDatabaseHandler.java

@@ -98,7 +98,7 @@ public class JSONDatabaseHandler<T> extends AbstractJSONDatabaseHandler<T> {
     }
 
     @Override
-    public CompletableFuture<Boolean> saveObject(T instance) throws IntrospectionException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
+    public CompletableFuture<Boolean> saveObject(T instance) throws IntrospectionException, IllegalAccessException, InvocationTargetException {
         CompletableFuture<Boolean> completableFuture = new CompletableFuture<>();
         // Null check
         if (instance == null) {

src/main/java/world/bentobox/bentobox/managers/AddonsManager.java

@@ -194,7 +194,7 @@ public class AddonsManager {
         String desc = perms.getString(perm + ".description");
         // Replace placeholders for Game Mode Addon names
         if (perm.contains(GAMEMODE)) {
-            getGameModeAddons().stream().map(g -> g.getPermissionPrefix())
+            getGameModeAddons().stream().map(Addon::getPermissionPrefix)
             .forEach(p -> DefaultPermissions.registerPermission(perm.replace(GAMEMODE, p), desc, pd));
         } else {
             // Single perm