Merge pull request #10 from takezoe/mark-override

Mark override methods
diff --git a/src/main/scala/Algorithm.scala b/src/main/scala/Algorithm.scala
index 2e980f5..0a9d448 100644
--- a/src/main/scala/Algorithm.scala
+++ b/src/main/scala/Algorithm.scala
@@ -15,6 +15,7 @@
 
   @transient lazy val logger = Logger[this.type]
 
+  override
   def train(sc: SparkContext, data: PreparedData): Model = {
     // Simply count number of events
     // and multiple it by the algorithm parameter
@@ -23,6 +24,7 @@
     new Model(mc = count)
   }
 
+  override
   def predict(model: Model, query: Query): PredictedResult = {
     // Prefix the query with the model data
     val result = s"${model.mc}-${query.q}"
diff --git a/src/main/scala/Preparator.scala b/src/main/scala/Preparator.scala
index 7e37500..18a8ed8 100644
--- a/src/main/scala/Preparator.scala
+++ b/src/main/scala/Preparator.scala
@@ -9,6 +9,7 @@
 class Preparator
   extends PPreparator[TrainingData, PreparedData] {
 
+  override
   def prepare(sc: SparkContext, trainingData: TrainingData): PreparedData = {
     new PreparedData(events = trainingData.events)
   }