Fix style issue

src/main/java/be/cylab/java/wowa/training/AbstractSolution.java

@@ -5,7 +5,11 @@ import be.cylab.java.roc.RocCoordinates;
 
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Date;
+import java.util.List;
+import java.util.Random;
 
 
 /**
@@ -122,6 +126,7 @@ public abstract class AbstractSolution
     }
 
     /**
+     * Method to compute AUC with List as argument.
      * @param data
      * @param expected
      * @return
@@ -143,6 +148,12 @@ public abstract class AbstractSolution
         return roc.computeAUC();
     }
 
+    /**
+     * Method to compute AUC with filename as arugument.
+     * @param filename_data
+     * @param filename_expected
+     * @return
+     */
     public final double computeAUC(
             final String filename_data,
             final String filename_expected) {