Updates spotless and adds a license header.

src/main/java/com/majinnaibu/bukkitplugins/metropolis/commands/MetropolisCommand.java

@@ -1,24 +1,40 @@
-package com.majinnaibu.bukkitplugins.metropolis.commands;
-
-import org.bukkit.command.Command;
-import org.bukkit.command.CommandExecutor;
-import org.bukkit.command.CommandSender;
-
-import com.majinnaibu.bukkitplugins.metropolis.MetropolisPlugin;
-
-public class MetropolisCommand implements CommandExecutor {
-	private MetropolisPlugin _plugin;
-	
-	public MetropolisCommand(MetropolisPlugin plugin){
-		_plugin = plugin;
-	}
-	
-	@Override
-	public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
-		
-		sender.sendMessage("Metropolis: version "+ _plugin.pdf.getVersion());
-		
-		return true;
-	}
-
-}
+/*
+This file is part of Metropolis.
+
+Metropolis 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.
+
+Metropolis 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 Metropolis. If not, see <https://www.gnu.org/licenses/agpl-3.0.txt>.
+*/
+
+package com.majinnaibu.bukkitplugins.metropolis.commands;
+
+import com.majinnaibu.bukkitplugins.metropolis.MetropolisPlugin;
+
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+
+public class MetropolisCommand implements CommandExecutor {
+  private MetropolisPlugin _plugin;
+
+  public MetropolisCommand(MetropolisPlugin plugin) {
+    _plugin = plugin;
+  }
+
+  @Override
+  public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
+
+    sender.sendMessage("Metropolis: version " + _plugin.pdf.getVersion());
+
+    return true;
+  }
+}