Add license boiler plate

examples/java/LinearAssignmentAPI.java

@@ -10,7 +10,8 @@
 // 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 com.google.ortools.java;
+
+package com.google.ortools.samples;
 
 import com.google.ortools.Loader;
 import com.google.ortools.graph.LinearSumAssignment;
@@ -19,6 +20,7 @@ import com.google.ortools.graph.LinearSumAssignment;
  * Test assignment on a 4x4 matrix. Example taken from
  *  http://www.ee.oulu.fi/~mpa/matreng/eem1_2-1.htm with kCost[0][1]
  *  modified so the optimum solution is unique.
+ *
  */
 public class LinearAssignmentAPI {
   private static void runAssignmentOn4x4Matrix() {