license added

src/main/java/ru/touchin/roboswag/core/utils/StringUtils.java

@@ -1,3 +1,22 @@
+/*
+ *  Copyright (c) 2016 RoboSwag (Gavriil Sitnikov, Vsevolod Ivanov)
+ *
+ *  This file is part of RoboSwag library.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ */
+
 package ru.touchin.roboswag.core.utils;
 
 import android.support.annotation.NonNull;
@@ -6,7 +25,11 @@ import java.security.MessageDigest;
 
 import rx.functions.Func1;
 
-public class StringUtils {
+/**
+ * Created by Gavriil Sitnikov on 29/08/2016.
+ * Utility class to providing some string-related helper methods.
+ */
+public final class StringUtils {
 
     /**
      * Returns MD5 of string.
@@ -81,5 +104,7 @@ public class StringUtils {
         return containsCharLike(text, Character::isUpperCase);
     }
 
+    private StringUtils() {
+    }
 
 }