diff --git a/src/main/java/Indexer.java b/src/main/java/Indexer.java
index cba81cc..bf8f717 100644
--- a/src/main/java/Indexer.java
+++ b/src/main/java/Indexer.java
@@ -624,6 +624,12 @@ private Collection<String> getFinal5Entities(Map<String,Integer> Entities) {
         return RankedEntities.values();
          **/
     }
+
+    /**
+     * this function write the documents and the entities into final file:
+     * documents- in bytes
+     * entities- find best 5 and then in bytes.
+     */
     private void writeFilesAndEntitiesToFinalFile() {
         File temp=new File(tempPathToEntities);
         File end=new File(_path+"/Entities"+_toStem+".txt");
@@ -996,7 +1002,7 @@ private void ifExistUpdateTF(String term, int tf) {
             int ptr=-1;
             Vector v=new Vector();
             v.add(df);
-            v.add(tf);
+            v.add(tottf);
             v.add(ptr);
             dictionary.remove(term);
             dictionary.put(term,v);
@@ -1017,7 +1023,7 @@ else if(dictionary.containsKey(Reverse(term))){//the reversed term in dictionary
             int ptr=-1;
             Vector v=new Vector();
             v.add(df);
-            v.add(tf);
+            v.add(tottf);
             v.add(ptr);
             dictionary.remove(term);
             dictionary.put(newTerm,v);
@@ -1431,6 +1437,11 @@ private void Merge(String firstHalf,String lastHalf,String toWrite) {
     }
 
 
+    /**
+     *
+     * @param line
+     * @return get the field which we sort by
+     */
     private static String getField(String line) {
         if(line.contains("\\^")) {
             String[] values = line.split("~");//valuse[0]-term, values[1]docLine-tf
diff --git a/src/main/java/MainController.java b/src/main/java/MainController.java
index d747d1a..6c07a5a 100644
--- a/src/main/java/MainController.java
+++ b/src/main/java/MainController.java
@@ -14,6 +14,11 @@ public class MainController {
     private AnchorPane ap;
 
 
+    /**
+     *
+     * @param actionEvent
+     * open part a of project
+     */
     public void partAactivate(ActionEvent actionEvent) {
         FXMLLoader fxmlLoader=new FXMLLoader();
         Parent root = null;
@@ -32,6 +37,11 @@ public void partAactivate(ActionEvent actionEvent) {
 
     }
 
+    /**
+     *
+     * @param actionEvent
+     * open part B of project
+     */
     public void partBactivate(ActionEvent actionEvent) {
         FXMLLoader fxmlLoader=new FXMLLoader();
         Parent root = null;