Add licence header to DbSettings.java

ethereumj-core/src/main/java/org/ethereum/datasource/DbSettings.java

@@ -1,3 +1,20 @@
+/*
+ * Copyright (c) [2016] [ <ether.camp> ]
+ * This file is part of the ethereumJ library.
+ *
+ * The ethereumJ library 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.
+ *
+ * The ethereumJ library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with the ethereumJ library. If not, see <http://www.gnu.org/licenses/>.
+ */
 package org.ethereum.datasource;
 
 /**