Minor changes.

* Added file header comment to `SetterMethodChecker.java`.
* Extended `SetterMethodCheckerTest.java` by test cases for Lazy
  Initialisation.
* Changed `MutatesAsInternalCaching.java` to be effective immutable
  as using Lazy Initialisation.

src/main/java/org/mutabilitydetector/checkers/settermethod/SetterMethodChecker.java

@@ -1,3 +1,19 @@
+/*
+ *    Copyright (c) 2008-2013 Graham Allan, Juergen Fickel
+ *
+ *   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 org.mutabilitydetector.checkers.settermethod;
 
 import static com.google.common.base.Preconditions.checkNotNull;

src/test/benchmarks/org/mutabilitydetector/benchmarks/mutabletofield/MutatesAsInternalCaching.java

@@ -30,9 +30,14 @@ public MutatesAsInternalCaching(String myString, String otherString) {
 
     public int getConcatenatedLength() {
         if (lengthWhenConcatenated == 0) {
-            lengthWhenConcatenated = myString.concat(otherString).length();
+//            lengthWhenConcatenated = myString.concat(otherString).length();
+            lengthWhenConcatenated = getLengthWhenConcatenated();
         }
         return lengthWhenConcatenated;
     }
+
+    private int getLengthWhenConcatenated() {
+        return myString.concat(otherString).length();
+    }
 
 }

src/test/java/org/mutabilitydetector/benchmarks/settermethod/SetterMethodCheckerTest.java

@@ -1,3 +1,19 @@
+/*
+ *    Copyright (c) 2008-2013 Graham Allan, Juergen Fickel
+ *
+ *   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 org.mutabilitydetector.benchmarks.settermethod;
 
 import static com.google.common.base.Preconditions.checkNotNull;