Add Copyright

Optimize Imports

SpigotCore_Main/src/de/steamwar/core/Core.java

@@ -28,10 +28,6 @@ import de.steamwar.sql.SQL;
 import org.bukkit.Bukkit;
 import org.bukkit.plugin.java.JavaPlugin;
 
-import java.util.Optional;
-import java.util.concurrent.Callable;
-import java.util.logging.Logger;
-
 
 public class Core extends JavaPlugin{
 	private static Core instance;

SpigotCore_Main/src/de/steamwar/core/ExceptionlessCallable.java

@@ -1,3 +1,22 @@
+/*
+    This file is a part of the SteamWar software.
+
+    Copyright (C) 2020  SteamWar.de-Serverteam
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
 package de.steamwar.core;
 
 @FunctionalInterface