Add missing license header

Author: kaklakariada

src/main/java/com/github/kaklakariada/fritzbox/model/homeautomation/Hkr.java

@@ -1,3 +1,20 @@
+/**
+ * A Java API for managing FritzBox HomeAutomation
+ * Copyright (C) 2017 Christoph Pirkl <christoph at users.sourceforge.net>
+ *
+ * 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.
+ *
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package com.github.kaklakariada.fritzbox.model.homeautomation;
 
 import org.simpleframework.xml.Element;

src/main/java/com/github/kaklakariada/fritzbox/model/homeautomation/NextChange.java

@@ -1,3 +1,20 @@
+/**
+ * A Java API for managing FritzBox HomeAutomation
+ * Copyright (C) 2017 Christoph Pirkl <christoph at users.sourceforge.net>
+ *
+ * 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.
+ *
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 package com.github.kaklakariada.fritzbox.model.homeautomation;
 
 import org.simpleframework.xml.Element;