Added docs into branch

Signed-off-by: Marcin Woźniak <y0rune@aol.com>

buisnesslogic/src/main/java/com/plannaplan/configutils/FileReader.java

@@ -12,9 +12,8 @@ import org.apache.poi.ss.usermodel.Row;
 import com.plannaplan.models.FileData;
 
 /**
- *  Dupa dupa dupd
+ *  FileReader is the class using for reading xls file from input stream.
  */
-
 public class FileReader {
 
     private InputStream fileInputStream;

buisnesslogic/src/main/java/com/plannaplan/configutils/FileToDatabaseMigrator.java

@@ -14,6 +14,9 @@ import org.apache.poi.ss.usermodel.Row;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
 
+/**
+ *  FileToDatabaseMigrator is used for migrate data from file (it reads line by line) and push it into database
+ */
 @Component
 public class FileToDatabaseMigrator {