Added docs into services

buisnesslogic/src/main/java/com/plannaplan/services/AssignmentService.java

@@ -9,6 +9,10 @@ import com.plannaplan.repositories.AssignmentRepository;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+/**
+ *  Service of Assignment which can save assignments, diplay assignments, get ammount of assigments.
+ */
+
 @Service
 public class AssignmentService {
     @Autowired

buisnesslogic/src/main/java/com/plannaplan/services/CommisionService.java

@@ -10,6 +10,10 @@ import com.plannaplan.repositories.CommisionRepository;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+/**
+ *  Service of CommisionService which can save commision, get user's commisions, get newest user's commision, get ammount of commisions.
+ */
+
 @Service
 public class CommisionService {
     @Autowired

buisnesslogic/src/main/java/com/plannaplan/services/ConfiguratorService.java

@@ -8,6 +8,9 @@ import org.springframework.stereotype.Component;
 
 import com.plannaplan.configutils.*;
 
+/**
+ *  FileReader is used for reading xls file from input stream.
+ */
 @Component
 public class ConfiguratorService {
 

buisnesslogic/src/main/java/com/plannaplan/services/CourseService.java

@@ -9,6 +9,10 @@ import com.plannaplan.repositories.CourseRepository;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+/**
+ *  Service of CourseService which can get(Course By Name, All Courses, Courses Ammount ), save, delete course.
+ */
+
 @Service
 public class CourseService {
     @Autowired

buisnesslogic/src/main/java/com/plannaplan/services/GroupService.java

@@ -9,6 +9,10 @@ import com.plannaplan.repositories.GroupRepository;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+/**
+ * Service of GroupService which can find(optional), get(By Course, Groups Ammount, Group By Id, find Not Existing Group), save, delete group.
+ */
+
 @Service
 public class GroupService {
     @Autowired

buisnesslogic/src/main/java/com/plannaplan/services/LecturerService.java

@@ -8,6 +8,9 @@ import com.plannaplan.repositories.LecturerRepository;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+/**
+ *  Service of LecturerService which can get(Lecturer, Lecturers Ammount), save, delete lecturers.
+ */
 @Service
 public class LecturerService {
     @Autowired

buisnesslogic/src/main/java/com/plannaplan/services/UserService.java

@@ -12,6 +12,9 @@ import com.plannaplan.types.UserRoles;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+/**
+ *  Service of UserService which can get(By Email), login, save user.
+ */
 @Service
 public class UserService {
     @Autowired