Fix checkstyle

Author: mahasv

src/test/java/pl/project13/core/cibuild/BuildServerDataProviderTest.java

@@ -1,3 +1,20 @@
+/*
+ * This file is part of git-commit-id-plugin-core by Konrad 'ktoso' Malawski <konrad.malawski@java.pl>
+ *
+ * git-commit-id-plugin-core is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * git-commit-id-plugin-core 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 Lesser General Public License
+ * along with git-commit-id-plugin-core.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 package pl.project13.core.cibuild;
 
 import org.junit.jupiter.api.Nested;

src/test/java/pl/project13/core/log/DummyLogInterface.java

@@ -1,3 +1,20 @@
+/*
+ * This file is part of git-commit-id-plugin-core by Konrad 'ktoso' Malawski <konrad.malawski@java.pl>
+ *
+ * git-commit-id-plugin-core is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * git-commit-id-plugin-core 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 Lesser General Public License
+ * along with git-commit-id-plugin-core.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 package pl.project13.core.log;
 
 public class DummyLogInterface implements LogInterface {