diff --git a/src/main/java/ru/ulstu/conference/controller/ConferenceController.java b/src/main/java/ru/ulstu/conference/controller/ConferenceController.java
index 0da1c12..370e996 100644
--- a/src/main/java/ru/ulstu/conference/controller/ConferenceController.java
+++ b/src/main/java/ru/ulstu/conference/controller/ConferenceController.java
@@ -4,7 +4,12 @@ package ru.ulstu.conference.controller;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.ModelMap;
 import org.springframework.validation.Errors;
-import org.springframework.web.bind.annotation.*;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
 import ru.ulstu.conference.model.ConferenceDto;
 import ru.ulstu.conference.model.ConferenceFilterDto;
 import ru.ulstu.conference.model.ConferenceUser;
@@ -21,7 +26,9 @@ import java.util.List;
 import java.util.stream.Collectors;
 
 import static org.springframework.util.StringUtils.isEmpty;
-import static ru.ulstu.core.controller.Navigation.*;
+import static ru.ulstu.core.controller.Navigation.CONFERENCES_PAGE;
+import static ru.ulstu.core.controller.Navigation.CONFERENCE_PAGE;
+import static ru.ulstu.core.controller.Navigation.REDIRECT_TO;
 
 
 @Controller()
diff --git a/src/main/java/ru/ulstu/conference/model/Conference.java b/src/main/java/ru/ulstu/conference/model/Conference.java
index d602438..e252e4d 100644
--- a/src/main/java/ru/ulstu/conference/model/Conference.java
+++ b/src/main/java/ru/ulstu/conference/model/Conference.java
@@ -8,7 +8,18 @@ import ru.ulstu.core.model.BaseEntity;
 import ru.ulstu.deadline.model.Deadline;
 import ru.ulstu.paper.model.Paper;
 
-import javax.persistence.*;
+import javax.persistence.CascadeType;
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.FetchType;
+import javax.persistence.JoinColumn;
+import javax.persistence.JoinTable;
+import javax.persistence.ManyToMany;
+import javax.persistence.OneToMany;
+import javax.persistence.OrderBy;
+import javax.persistence.Table;
+import javax.persistence.Temporal;
+import javax.persistence.TemporalType;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
diff --git a/src/main/java/ru/ulstu/conference/model/ConferenceUser.java b/src/main/java/ru/ulstu/conference/model/ConferenceUser.java
index b2d2d36..63eeb6d 100644
--- a/src/main/java/ru/ulstu/conference/model/ConferenceUser.java
+++ b/src/main/java/ru/ulstu/conference/model/ConferenceUser.java
@@ -5,7 +5,13 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import ru.ulstu.core.model.BaseEntity;
 import ru.ulstu.user.model.User;
 
-import javax.persistence.*;
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.EnumType;
+import javax.persistence.Enumerated;
+import javax.persistence.JoinColumn;
+import javax.persistence.ManyToOne;
+import javax.persistence.Table;
 import javax.validation.constraints.NotNull;
 
 @Entity
diff --git a/src/main/java/ru/ulstu/core/model/BaseEntity.java b/src/main/java/ru/ulstu/core/model/BaseEntity.java
index bd0f1e4..d3dfa76 100644
--- a/src/main/java/ru/ulstu/core/model/BaseEntity.java
+++ b/src/main/java/ru/ulstu/core/model/BaseEntity.java
@@ -1,6 +1,10 @@
 package ru.ulstu.core.model;
 
-import javax.persistence.*;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.MappedSuperclass;
+import javax.persistence.Version;
 import java.io.Serializable;
 
 @MappedSuperclass
diff --git a/src/main/java/ru/ulstu/core/util/DateUtils.java b/src/main/java/ru/ulstu/core/util/DateUtils.java
index 42a4182..6122583 100644
--- a/src/main/java/ru/ulstu/core/util/DateUtils.java
+++ b/src/main/java/ru/ulstu/core/util/DateUtils.java
@@ -1,6 +1,11 @@
 package ru.ulstu.core.util;
 
-import java.time.*;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.LocalTime;
+import java.time.Month;
+import java.time.ZoneId;
 import java.util.Arrays;
 import java.util.Calendar;
 import java.util.Date;
diff --git a/src/main/java/ru/ulstu/grant/controller/GrantController.java b/src/main/java/ru/ulstu/grant/controller/GrantController.java
index b633261..0731188 100644
--- a/src/main/java/ru/ulstu/grant/controller/GrantController.java
+++ b/src/main/java/ru/ulstu/grant/controller/GrantController.java
@@ -3,7 +3,12 @@ package ru.ulstu.grant.controller;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.ModelMap;
 import org.springframework.validation.Errors;
-import org.springframework.web.bind.annotation.*;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
 import ru.ulstu.deadline.model.Deadline;
 import ru.ulstu.grant.model.Grant;
 import ru.ulstu.grant.model.GrantDto;
@@ -17,7 +22,9 @@ import java.util.List;
 import java.util.stream.Collectors;
 
 import static org.springframework.util.StringUtils.isEmpty;
-import static ru.ulstu.core.controller.Navigation.*;
+import static ru.ulstu.core.controller.Navigation.GRANTS_PAGE;
+import static ru.ulstu.core.controller.Navigation.GRANT_PAGE;
+import static ru.ulstu.core.controller.Navigation.REDIRECT_TO;
 
 
 @Controller()
diff --git a/src/main/java/ru/ulstu/grant/model/Grant.java b/src/main/java/ru/ulstu/grant/model/Grant.java
index 7853166..9b1e8fe 100644
--- a/src/main/java/ru/ulstu/grant/model/Grant.java
+++ b/src/main/java/ru/ulstu/grant/model/Grant.java
@@ -8,9 +8,25 @@ import ru.ulstu.file.model.FileData;
 import ru.ulstu.project.model.Project;
 import ru.ulstu.user.model.User;
 
-import javax.persistence.*;
+import javax.persistence.CascadeType;
+import javax.persistence.Entity;
+import javax.persistence.EnumType;
+import javax.persistence.Enumerated;
+import javax.persistence.FetchType;
+import javax.persistence.JoinColumn;
+import javax.persistence.ManyToMany;
+import javax.persistence.ManyToOne;
+import javax.persistence.OneToMany;
+import javax.persistence.OrderBy;
+import javax.persistence.Table;
 import javax.validation.constraints.NotNull;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.Date;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Optional;
+import java.util.Set;
 
 @Entity
 @Table(name = "grants")
diff --git a/src/main/java/ru/ulstu/paper/controller/PaperController.java b/src/main/java/ru/ulstu/paper/controller/PaperController.java
index 5a5f915..ad30822 100644
--- a/src/main/java/ru/ulstu/paper/controller/PaperController.java
+++ b/src/main/java/ru/ulstu/paper/controller/PaperController.java
@@ -6,7 +6,12 @@ import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.ModelMap;
 import org.springframework.validation.Errors;
-import org.springframework.web.bind.annotation.*;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
 import ru.ulstu.deadline.model.Deadline;
 import ru.ulstu.paper.model.Paper;
 import ru.ulstu.paper.model.PaperDto;
diff --git a/src/main/java/ru/ulstu/paper/model/Paper.java b/src/main/java/ru/ulstu/paper/model/Paper.java
index cb4a31d..c7f7fcf 100644
--- a/src/main/java/ru/ulstu/paper/model/Paper.java
+++ b/src/main/java/ru/ulstu/paper/model/Paper.java
@@ -10,8 +10,25 @@ import ru.ulstu.file.model.FileData;
 import ru.ulstu.timeline.model.Event;
 import ru.ulstu.user.model.User;
 
-import javax.persistence.*;
-import java.util.*;
+import javax.persistence.CascadeType;
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.EnumType;
+import javax.persistence.Enumerated;
+import javax.persistence.FetchType;
+import javax.persistence.JoinColumn;
+import javax.persistence.ManyToMany;
+import javax.persistence.OneToMany;
+import javax.persistence.OrderBy;
+import javax.persistence.Temporal;
+import javax.persistence.TemporalType;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.Date;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Optional;
+import java.util.Set;
 
 @Entity
 public class Paper extends BaseEntity implements UserContainer {
diff --git a/src/main/java/ru/ulstu/paper/service/PaperService.java b/src/main/java/ru/ulstu/paper/service/PaperService.java
index 5a6eb23..a10d941 100644
--- a/src/main/java/ru/ulstu/paper/service/PaperService.java
+++ b/src/main/java/ru/ulstu/paper/service/PaperService.java
@@ -16,13 +16,21 @@ import ru.ulstu.user.model.User;
 import ru.ulstu.user.service.UserService;
 
 import java.io.IOException;
-import java.util.*;
+import java.util.Arrays;
+import java.util.Date;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
 import java.util.stream.Collectors;
 
 import static java.util.stream.Collectors.toList;
 import static org.springframework.util.ObjectUtils.isEmpty;
 import static ru.ulstu.core.util.StreamApiUtils.convert;
-import static ru.ulstu.paper.model.Paper.PaperStatus.*;
+import static ru.ulstu.paper.model.Paper.PaperStatus.ATTENTION;
+import static ru.ulstu.paper.model.Paper.PaperStatus.COMPLETED;
+import static ru.ulstu.paper.model.Paper.PaperStatus.DRAFT;
+import static ru.ulstu.paper.model.Paper.PaperStatus.FAILED;
+import static ru.ulstu.paper.model.Paper.PaperStatus.ON_PREPARATION;
 
 @Service
 public class PaperService {
diff --git a/src/main/java/ru/ulstu/students/controller/TaskController.java b/src/main/java/ru/ulstu/students/controller/TaskController.java
index f6eefc7..2dd23b5 100644
--- a/src/main/java/ru/ulstu/students/controller/TaskController.java
+++ b/src/main/java/ru/ulstu/students/controller/TaskController.java
@@ -3,7 +3,12 @@ package ru.ulstu.students.controller;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.ModelMap;
 import org.springframework.validation.Errors;
-import org.springframework.web.bind.annotation.*;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
 import ru.ulstu.deadline.model.Deadline;
 import ru.ulstu.students.model.Task;
 import ru.ulstu.students.model.TaskDto;
@@ -18,7 +23,9 @@ import java.util.List;
 import java.util.stream.Collectors;
 
 import static org.springframework.util.StringUtils.isEmpty;
-import static ru.ulstu.students.controller.Navigation.*;
+import static ru.ulstu.students.controller.Navigation.REDIRECT_TO;
+import static ru.ulstu.students.controller.Navigation.TASKS_PAGE;
+import static ru.ulstu.students.controller.Navigation.TASK_PAGE;
 
 @Controller()
 @RequestMapping(value = "/students")
diff --git a/src/main/java/ru/ulstu/students/model/Task.java b/src/main/java/ru/ulstu/students/model/Task.java
index 17a6236..8ec9081 100644
--- a/src/main/java/ru/ulstu/students/model/Task.java
+++ b/src/main/java/ru/ulstu/students/model/Task.java
@@ -7,7 +7,19 @@ import ru.ulstu.core.model.BaseEntity;
 import ru.ulstu.deadline.model.Deadline;
 import ru.ulstu.tags.model.Tag;
 
-import javax.persistence.*;
+import javax.persistence.CascadeType;
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.EnumType;
+import javax.persistence.Enumerated;
+import javax.persistence.FetchType;
+import javax.persistence.JoinColumn;
+import javax.persistence.JoinTable;
+import javax.persistence.ManyToMany;
+import javax.persistence.OneToMany;
+import javax.persistence.OrderBy;
+import javax.persistence.Temporal;
+import javax.persistence.TemporalType;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
diff --git a/src/main/java/ru/ulstu/user/model/User.java b/src/main/java/ru/ulstu/user/model/User.java
index e18414d..7946f04 100644
--- a/src/main/java/ru/ulstu/user/model/User.java
+++ b/src/main/java/ru/ulstu/user/model/User.java
@@ -5,7 +5,16 @@ import org.hibernate.validator.constraints.Email;
 import ru.ulstu.configuration.Constants;
 import ru.ulstu.core.model.BaseEntity;
 
-import javax.persistence.*;
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.EnumType;
+import javax.persistence.Enumerated;
+import javax.persistence.JoinColumn;
+import javax.persistence.JoinTable;
+import javax.persistence.ManyToMany;
+import javax.persistence.Table;
+import javax.persistence.Temporal;
+import javax.persistence.TemporalType;
 import javax.validation.constraints.NotNull;
 import javax.validation.constraints.Pattern;
 import javax.validation.constraints.Size;
diff --git a/src/main/java/ru/ulstu/user/model/UserDto.java b/src/main/java/ru/ulstu/user/model/UserDto.java
index 2a0f7af..39ff913 100644
--- a/src/main/java/ru/ulstu/user/model/UserDto.java
+++ b/src/main/java/ru/ulstu/user/model/UserDto.java
@@ -14,7 +14,11 @@ import ru.ulstu.user.controller.UserController;
 
 import javax.validation.constraints.Pattern;
 import javax.validation.constraints.Size;
-import java.util.*;
+import java.util.Collection;
+import java.util.Date;
+import java.util.LinkedHashSet;
+import java.util.Objects;
+import java.util.Set;
 import java.util.stream.Collectors;
 
 import static ru.ulstu.odin.model.annotation.OdinString.OdinStringType.PASSWORD;
diff --git a/src/main/java/ru/ulstu/user/model/UserSession.java b/src/main/java/ru/ulstu/user/model/UserSession.java
index 1eb761d..50fec65 100644
--- a/src/main/java/ru/ulstu/user/model/UserSession.java
+++ b/src/main/java/ru/ulstu/user/model/UserSession.java
@@ -2,7 +2,13 @@ package ru.ulstu.user.model;
 
 import ru.ulstu.core.model.BaseEntity;
 
-import javax.persistence.*;
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.JoinColumn;
+import javax.persistence.ManyToOne;
+import javax.persistence.Table;
+import javax.persistence.Temporal;
+import javax.persistence.TemporalType;
 import javax.validation.constraints.NotNull;
 import java.util.Date;
 
diff --git a/src/main/java/ru/ulstu/user/service/UserService.java b/src/main/java/ru/ulstu/user/service/UserService.java
index 7e97b83..c98e4b7 100644
--- a/src/main/java/ru/ulstu/user/service/UserService.java
+++ b/src/main/java/ru/ulstu/user/service/UserService.java
@@ -16,13 +16,33 @@ import ru.ulstu.core.error.EntityIdIsNullException;
 import ru.ulstu.core.jpa.OffsetablePageRequest;
 import ru.ulstu.core.model.BaseEntity;
 import ru.ulstu.core.model.response.PageableItems;
-import ru.ulstu.user.error.*;
-import ru.ulstu.user.model.*;
+import ru.ulstu.user.error.UserActivationError;
+import ru.ulstu.user.error.UserEmailExistsException;
+import ru.ulstu.user.error.UserIdExistsException;
+import ru.ulstu.user.error.UserIsUndeadException;
+import ru.ulstu.user.error.UserLoginExistsException;
+import ru.ulstu.user.error.UserNotActivatedException;
+import ru.ulstu.user.error.UserNotFoundException;
+import ru.ulstu.user.error.UserPasswordsNotValidOrNotMatchException;
+import ru.ulstu.user.error.UserResetKeyError;
+import ru.ulstu.user.model.User;
+import ru.ulstu.user.model.UserDto;
+import ru.ulstu.user.model.UserListDto;
+import ru.ulstu.user.model.UserResetPasswordDto;
+import ru.ulstu.user.model.UserRole;
+import ru.ulstu.user.model.UserRoleConstants;
+import ru.ulstu.user.model.UserRoleDto;
 import ru.ulstu.user.repository.UserRepository;
 import ru.ulstu.user.repository.UserRoleRepository;
 import ru.ulstu.user.util.UserUtils;
 
-import java.util.*;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.Date;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
 import java.util.stream.Collectors;
 
 @Service