Added license notice to source code

src/org/kygekteam/java/kygekpingtps/Main.java

@@ -1,3 +1,13 @@
+/*
+ * See server TPS and a player's ping
+ * Copyright (C) 2021 KygekTeam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ */
+
 package org.kygekteam.java.kygekpingtps;
 
 import org.bukkit.ChatColor;

src/org/kygekteam/java/kygekpingtps/Ping.java

@@ -1,3 +1,13 @@
+/*
+ * See server TPS and a player's ping
+ * Copyright (C) 2021 KygekTeam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ */
+
 package org.kygekteam.java.kygekpingtps;
 
 import org.bukkit.ChatColor;

src/org/kygekteam/java/kygekpingtps/TPS.java

@@ -1,3 +1,13 @@
+/*
+ * See server TPS and a player's ping
+ * Copyright (C) 2021 KygekTeam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ */
+
 package org.kygekteam.java.kygekpingtps;
 
 import org.bukkit.ChatColor;

src/plugin.yml

@@ -1,6 +1,6 @@
 ---
 # See server TPS and a player's ping
-# Copyright (C) 2020 KygekTeam
+# Copyright (C) 2021 KygekTeam
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by