diff --git a/build.gradle b/build.gradle
index 0d2a506..9ef6c17 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,6 +1,6 @@
 buildscript {
     ext {
-        versionSpringBoot = '2.3.8.RELEASE'
+        versionSpringBoot = '2.3.9.RELEASE'
     }
 
     repositories {
@@ -47,11 +47,10 @@ dependencies {
     compile group: 'org.springframework.boot', name: 'spring-boot-starter-web'
     compile group: 'org.springframework.boot', name: 'spring-boot-starter-jetty'
     compile group: 'org.springframework.boot', name: 'spring-boot-starter-thymeleaf'
+    compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-jpa'
     compile group: 'nz.net.ultraq.thymeleaf', name: 'thymeleaf-layout-dialect'
-    compile group: 'org.springframework.data', name: 'spring-data-commons'
     compile group: 'com.fasterxml.jackson.module', name: 'jackson-module-afterburner'
     compile group: 'com.fasterxml.jackson.datatype', name: 'jackson-datatype-hibernate5'
-    compile group: 'org.springframework.boot', name: 'spring-boot-starter-jdbc'
     compile group: 'org.postgresql', name: 'postgresql', version: '9.4.1212'
     compile group: 'org.liquibase', name: 'liquibase-core', version: '4.3.1'
 
diff --git a/src/main/java/ru/ulstu/extractor/controller/GitFilteringController.java b/src/main/java/ru/ulstu/extractor/controller/GitFilteringController.java
index 5203c7d..f4dcde8 100644
--- a/src/main/java/ru/ulstu/extractor/controller/GitFilteringController.java
+++ b/src/main/java/ru/ulstu/extractor/controller/GitFilteringController.java
@@ -38,7 +38,7 @@ public class GitFilteringController {
 
     @PostMapping("/sendFilter")
     public String sendFilter(@ModelAttribute FilterForm filterForm, Model model) throws GitAPIException, IOException {
-        List<Commit> list = gitRepositoryService.getCommits(filterForm.getUrl());
+        List<Commit> list = gitRepositoryService.getCommits(filterForm.getUrl(), filterForm.getBranch());
         model.addAttribute("commits", list);
         if (filterForm.getFilter() == null || filterForm.getFilter().isEmpty()) {
             model.addAttribute("error", "'Строка' не должно быть пустым");
@@ -53,11 +53,11 @@ public class GitFilteringController {
             @ModelAttribute FilterForm filterForm,
             @RequestParam("page") Optional<Integer> page,
             @RequestParam("size") Optional<Integer> size,
-            @RequestParam String url,
-            @RequestParam String branch) throws GitAPIException, IOException {
+            @RequestParam String repositoryUrl,
+            @RequestParam String branchName) throws GitAPIException, IOException {
         int currentPage = page.orElse(1);
         int pageSize = size.orElse(5);
-        Page<Commit> commitPage = commitService.findPaginated(PageRequest.of(currentPage - 1, pageSize), url);
+        Page<Commit> commitPage = commitService.findPaginated(PageRequest.of(currentPage - 1, pageSize), repositoryUrl, branchName);
         model.addAttribute("commitPage", commitPage);
         int totalPages = commitPage.getTotalPages();
         if (totalPages > 0) {
diff --git a/src/main/java/ru/ulstu/extractor/controller/GitIndexingController.java b/src/main/java/ru/ulstu/extractor/controller/GitIndexingController.java
index 964bc4a..00beb20 100644
--- a/src/main/java/ru/ulstu/extractor/controller/GitIndexingController.java
+++ b/src/main/java/ru/ulstu/extractor/controller/GitIndexingController.java
@@ -11,15 +11,19 @@ import ru.ulstu.extractor.model.Branch;
 import ru.ulstu.extractor.model.mvc.FilterForm;
 import ru.ulstu.extractor.model.mvc.RepoForm;
 import ru.ulstu.extractor.service.GitRepositoryService;
+import ru.ulstu.extractor.service.IndexService;
 
 import java.util.List;
 
 @Controller
 public class GitIndexingController {
     private final GitRepositoryService gitRepositoryService;
+    private final IndexService indexService;
 
-    public GitIndexingController(GitRepositoryService gitRepositoryService) {
+    public GitIndexingController(GitRepositoryService gitRepositoryService,
+                                 IndexService indexService) {
         this.gitRepositoryService = gitRepositoryService;
+        this.indexService = indexService;
     }
 
     @GetMapping("/newRepo")
@@ -47,6 +51,12 @@ public class GitIndexingController {
         if (repoForm.getBranch() == null) {
             return "newRepo";
         } else {
+            try {
+                indexService.index(repoForm.getRepo(), repoForm.getBranch());
+            } catch (Exception ex) {
+                model.addAttribute("error", ex.getMessage());
+                return "newRepo";
+            }
             redirectAttributes.addAttribute("url", repoForm.getRepo());
             redirectAttributes.addAttribute("branch", repoForm.getBranch());
             return "redirect:/filtering";
diff --git a/src/main/java/ru/ulstu/extractor/controller/RepoController.java b/src/main/java/ru/ulstu/extractor/controller/RepoController.java
index 2d30d9a..09ea5d5 100644
--- a/src/main/java/ru/ulstu/extractor/controller/RepoController.java
+++ b/src/main/java/ru/ulstu/extractor/controller/RepoController.java
@@ -29,8 +29,9 @@ public class RepoController {
     }
 
     @GetMapping("commits")
-    public List<Commit> getCommits(@RequestParam("url") String url) throws GitAPIException, IOException {
-        return gitRepositoryService.getCommits(url);
+    public List<Commit> getCommits(@RequestParam("repositoryUrl") String repositoryUrl,
+                                   @RequestParam("branchName") String branchName) throws GitAPIException, IOException {
+        return gitRepositoryService.getCommits(repositoryUrl, branchName);
     }
 
 }
diff --git a/src/main/java/ru/ulstu/extractor/model/Author.java b/src/main/java/ru/ulstu/extractor/model/Author.java
new file mode 100644
index 0000000..2462d5b
--- /dev/null
+++ b/src/main/java/ru/ulstu/extractor/model/Author.java
@@ -0,0 +1,23 @@
+package ru.ulstu.extractor.model;
+
+import javax.persistence.Entity;
+
+@Entity
+public class Author extends BaseEntity {
+    private String name;
+
+    public Author() {
+    }
+
+    public Author(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}
diff --git a/src/main/java/ru/ulstu/extractor/model/BaseEntity.java b/src/main/java/ru/ulstu/extractor/model/BaseEntity.java
new file mode 100644
index 0000000..0859807
--- /dev/null
+++ b/src/main/java/ru/ulstu/extractor/model/BaseEntity.java
@@ -0,0 +1,86 @@
+package ru.ulstu.extractor.model;
+
+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
+public abstract class BaseEntity implements Serializable, Comparable {
+    @Id
+    @GeneratedValue(strategy = GenerationType.TABLE)
+    private Integer id;
+
+    @Version
+    private Integer version;
+
+    public BaseEntity() {
+    }
+
+    public BaseEntity(Integer id, Integer version) {
+        this.id = id;
+        this.version = version;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public Integer getVersion() {
+        return version;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!getClass().isAssignableFrom(obj.getClass())) {
+            return false;
+        }
+        BaseEntity other = (BaseEntity) obj;
+        if (id == null) {
+            if (other.id != null) {
+                return false;
+            }
+        } else if (!id.equals(other.id)) {
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + (id == null ? 0 : id.hashCode());
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return getClass().getSimpleName() + "{" +
+                "id=" + id +
+                ", version=" + version +
+                '}';
+    }
+
+    @Override
+    public int compareTo(Object o) {
+        return id != null ? id.compareTo(((BaseEntity) o).getId()) : -1;
+    }
+
+    public void reset() {
+        this.id = null;
+        this.version = null;
+    }
+}
diff --git a/src/main/java/ru/ulstu/extractor/model/Branch.java b/src/main/java/ru/ulstu/extractor/model/Branch.java
index 4f751d2..02a6349 100644
--- a/src/main/java/ru/ulstu/extractor/model/Branch.java
+++ b/src/main/java/ru/ulstu/extractor/model/Branch.java
@@ -1,14 +1,61 @@
 package ru.ulstu.extractor.model;
 
-public class Branch {
+import org.hibernate.annotations.Fetch;
+import org.hibernate.annotations.FetchMode;
+
+import javax.persistence.CascadeType;
+import javax.persistence.Entity;
+import javax.persistence.FetchType;
+import javax.persistence.JoinColumn;
+import javax.persistence.ManyToOne;
+import javax.persistence.OneToMany;
+import java.util.List;
+
+@Entity
+public class Branch extends BaseEntity {
     private String name;
 
+    @ManyToOne
+    private Repository repository;
+
+    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
+    @JoinColumn(name = "branch_id", unique = true)
+    @Fetch(FetchMode.SUBSELECT)
+    private List<Commit> commits;
+
+    public Branch() {
+    }
+
     public Branch(String name) {
         this.name = name;
     }
 
+    public Branch(Repository repository, String branchName) {
+        this.repository = repository;
+        this.name = branchName;
+    }
+
     public String getName() {
         return name;
     }
 
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Repository getRepository() {
+        return repository;
+    }
+
+    public void setRepository(Repository repository) {
+        this.repository = repository;
+    }
+
+    public List<Commit> getCommits() {
+        return commits;
+    }
+
+    public void setCommits(List<Commit> commits) {
+        this.commits = commits;
+    }
 }
diff --git a/src/main/java/ru/ulstu/extractor/model/Commit.java b/src/main/java/ru/ulstu/extractor/model/Commit.java
index 9e8e6f4..e7d6795 100644
--- a/src/main/java/ru/ulstu/extractor/model/Commit.java
+++ b/src/main/java/ru/ulstu/extractor/model/Commit.java
@@ -1,18 +1,37 @@
 package ru.ulstu.extractor.model;
 
+import org.hibernate.annotations.Fetch;
+import org.hibernate.annotations.FetchMode;
+
+import javax.persistence.CascadeType;
+import javax.persistence.Entity;
+import javax.persistence.FetchType;
+import javax.persistence.JoinColumn;
+import javax.persistence.ManyToOne;
+import javax.persistence.OneToMany;
+import java.util.ArrayList;
 import java.util.Date;
+import java.util.List;
 
-public class Commit {
-    private String message;
+@Entity
+public class Commit extends BaseEntity {
+    private String hash;
     private Date date;
-    private String author;
-    private Changes changes;
+    private String message;
+    @ManyToOne
+    private Author author;
+    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
+    @JoinColumn(name = "commit_id", unique = true)
+    @Fetch(FetchMode.SUBSELECT)
+    private List<FileChange> fileChanges = new ArrayList<>();
 
-    public Commit(String message, String author, Date date) {
+    public Commit() {
+    }
+
+    public Commit(String message, Author author, Date date) {
         this.message = message;
         this.author = author;
         this.date = date;
-
     }
 
     public String getMessage() {
@@ -23,15 +42,35 @@ public class Commit {
         return date;
     }
 
-    public String getAuthor() {
-        return author;
+    public String getHash() {
+        return hash;
     }
 
-    public Changes getChanges() {
-        return changes;
+    public void setHash(String hash) {
+        this.hash = hash;
     }
 
-    public void setChanges(Changes changes) {
-        this.changes = changes;
+    public void setDate(Date date) {
+        this.date = date;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public void setAuthor(Author author) {
+        this.author = author;
+    }
+
+    public List<FileChange> getFileChanges() {
+        return fileChanges;
+    }
+
+    public void setFileChanges(List<FileChange> fileChanges) {
+        this.fileChanges = fileChanges;
+    }
+
+    public Author getAuthor() {
+        return author;
     }
 }
diff --git a/src/main/java/ru/ulstu/extractor/model/FileChange.java b/src/main/java/ru/ulstu/extractor/model/FileChange.java
index fb0ec6b..2493da6 100644
--- a/src/main/java/ru/ulstu/extractor/model/FileChange.java
+++ b/src/main/java/ru/ulstu/extractor/model/FileChange.java
@@ -1,12 +1,28 @@
 package ru.ulstu.extractor.model;
 
+import org.hibernate.annotations.Fetch;
+import org.hibernate.annotations.FetchMode;
+
+import javax.persistence.CascadeType;
+import javax.persistence.Entity;
+import javax.persistence.FetchType;
+import javax.persistence.JoinColumn;
+import javax.persistence.OneToMany;
+import javax.persistence.Transient;
 import java.util.ArrayList;
 import java.util.List;
 
-public class FileChange {
+@Entity
+public class FileChange extends BaseEntity {
     private String file;
+    @Transient
     private boolean removed;
+    @Transient
     private boolean added;
+
+    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
+    @JoinColumn(name = "file_change_id", unique = true)
+    @Fetch(FetchMode.SUBSELECT)
     private List<LineChange> lineChanges = new ArrayList<>();
 
     public FileChange() {
@@ -47,4 +63,12 @@ public class FileChange {
     public void setLineChanges(List<LineChange> lineChanges) {
         this.lineChanges = lineChanges;
     }
+
+    public boolean isRemoved() {
+        return removed;
+    }
+
+    public boolean isAdded() {
+        return added;
+    }
 }
diff --git a/src/main/java/ru/ulstu/extractor/model/LineChange.java b/src/main/java/ru/ulstu/extractor/model/LineChange.java
index 7f1bab3..7901322 100644
--- a/src/main/java/ru/ulstu/extractor/model/LineChange.java
+++ b/src/main/java/ru/ulstu/extractor/model/LineChange.java
@@ -1,7 +1,13 @@
 package ru.ulstu.extractor.model;
 
-public class LineChange {
+import javax.persistence.Entity;
+import javax.persistence.Transient;
+
+@Entity
+public class LineChange extends BaseEntity {
+    @Transient
     private boolean added;
+    @Transient
     private boolean removed;
     private String lineFrom;
     private String lineTo;
@@ -42,4 +48,19 @@ public class LineChange {
         return lineTo;
     }
 
+    public boolean isAdded() {
+        return added;
+    }
+
+    public void setAdded(boolean added) {
+        this.added = added;
+    }
+
+    public boolean isRemoved() {
+        return removed;
+    }
+
+    public void setRemoved(boolean removed) {
+        this.removed = removed;
+    }
 }
diff --git a/src/main/java/ru/ulstu/extractor/model/Repository.java b/src/main/java/ru/ulstu/extractor/model/Repository.java
new file mode 100644
index 0000000..651bfca
--- /dev/null
+++ b/src/main/java/ru/ulstu/extractor/model/Repository.java
@@ -0,0 +1,23 @@
+package ru.ulstu.extractor.model;
+
+import javax.persistence.Entity;
+
+@Entity
+public class Repository extends BaseEntity {
+    private String url;
+
+    public Repository() {
+    }
+
+    public Repository(String repositoryUrl) {
+        url = repositoryUrl;
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+}
diff --git a/src/main/java/ru/ulstu/extractor/model/mvc/FilterForm.java b/src/main/java/ru/ulstu/extractor/model/mvc/FilterForm.java
index 67f2194..4946871 100644
--- a/src/main/java/ru/ulstu/extractor/model/mvc/FilterForm.java
+++ b/src/main/java/ru/ulstu/extractor/model/mvc/FilterForm.java
@@ -3,6 +3,7 @@ package ru.ulstu.extractor.model.mvc;
 public class FilterForm {
     private String filter;
     private String url;
+    private String branch;
 
     public FilterForm() {
     }
@@ -27,6 +28,14 @@ public class FilterForm {
         this.url = url;
     }
 
+    public String getBranch() {
+        return branch;
+    }
+
+    public void setBranch(String branch) {
+        this.branch = branch;
+    }
+
     @Override
     public String toString() {
         return "FilterForm{" +
diff --git a/src/main/java/ru/ulstu/extractor/repository/BranchRepository.java b/src/main/java/ru/ulstu/extractor/repository/BranchRepository.java
new file mode 100644
index 0000000..f982d1e
--- /dev/null
+++ b/src/main/java/ru/ulstu/extractor/repository/BranchRepository.java
@@ -0,0 +1,11 @@
+package ru.ulstu.extractor.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import ru.ulstu.extractor.model.Branch;
+import ru.ulstu.extractor.model.Repository;
+
+import java.util.Optional;
+
+public interface BranchRepository extends JpaRepository<Branch, Integer> {
+    Optional<Branch> findByRepositoryAndName(Repository repository, String name);
+}
diff --git a/src/main/java/ru/ulstu/extractor/repository/CommitRepository.java b/src/main/java/ru/ulstu/extractor/repository/CommitRepository.java
index e185761..fd386d4 100644
--- a/src/main/java/ru/ulstu/extractor/repository/CommitRepository.java
+++ b/src/main/java/ru/ulstu/extractor/repository/CommitRepository.java
@@ -1,42 +1,7 @@
 package ru.ulstu.extractor.repository;
 
-import org.springframework.jdbc.core.JdbcTemplate;
-import org.springframework.jdbc.core.RowMapper;
-import org.springframework.stereotype.Repository;
+import org.springframework.data.jpa.repository.JpaRepository;
 import ru.ulstu.extractor.model.Commit;
 
-import java.sql.ResultSet;
-import java.sql.SQLException;
-import java.util.List;
-
-@Repository
-public class CommitRepository {
-    private final static String SQL_SELECT_COMMITS = "SELECT * FROM commit";
-    private final static String SQL_INSERT_COMMITS = "INSERT INTO commit (hash, date, author, message) " +
-            "VALUES (?, ?, ?, ?)";
-    private final JdbcTemplate jdbcTemplate;
-
-    public CommitRepository(JdbcTemplate jdbcTemplate) {
-        this.jdbcTemplate = jdbcTemplate;
-    }
-
-    private static class CommitRowMapper implements RowMapper<Commit> {
-
-        @Override
-        public Commit mapRow(ResultSet rs, int rowNum) throws SQLException {
-            return new Commit(rs.getString("message"),
-                    rs.getString("author"),
-                    rs.getDate("date"));
-        }
-    }
-
-    public List<Commit> getCommits() {
-        return jdbcTemplate.query(SQL_SELECT_COMMITS, new CommitRowMapper());
-    }
-
-    public void saveCommit(Commit commit) {
-        jdbcTemplate.update(SQL_INSERT_COMMITS, "", commit.getDate(),
-                commit.getAuthor(),
-                commit.getMessage());
-    }
+public interface CommitRepository extends JpaRepository<Commit, Integer> {
 }
diff --git a/src/main/java/ru/ulstu/extractor/repository/RepositoryRepository.java b/src/main/java/ru/ulstu/extractor/repository/RepositoryRepository.java
new file mode 100644
index 0000000..cedaa75
--- /dev/null
+++ b/src/main/java/ru/ulstu/extractor/repository/RepositoryRepository.java
@@ -0,0 +1,10 @@
+package ru.ulstu.extractor.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import ru.ulstu.extractor.model.Repository;
+
+import java.util.Optional;
+
+public interface RepositoryRepository extends JpaRepository<Repository, Integer> {
+    Optional<Repository> findByUrl(String url);
+}
diff --git a/src/main/java/ru/ulstu/extractor/service/CommitService.java b/src/main/java/ru/ulstu/extractor/service/CommitService.java
index 05ec123..62073d6 100644
--- a/src/main/java/ru/ulstu/extractor/service/CommitService.java
+++ b/src/main/java/ru/ulstu/extractor/service/CommitService.java
@@ -20,11 +20,11 @@ public class CommitService {
         this.gitRepositoryService = gitRepositoryService;
     }
 
-    public Page<Commit> findPaginated(Pageable pageable, String url) throws GitAPIException, IOException {
+    public Page<Commit> findPaginated(Pageable pageable, String repositoryUrl, String branchName) throws GitAPIException, IOException {
         int pageSize = pageable.getPageSize();
         int currentPage = pageable.getPageNumber();
         int startItem = currentPage * pageSize;
-        List<Commit> commits = gitRepositoryService.getCommits(url);
+        List<Commit> commits = gitRepositoryService.getCommits(repositoryUrl, branchName);
 
         if (commits.size() < startItem) {
             commits = Collections.emptyList();
diff --git a/src/main/java/ru/ulstu/extractor/service/GitRepositoryService.java b/src/main/java/ru/ulstu/extractor/service/GitRepositoryService.java
index 1d20e44..93c9aab 100644
--- a/src/main/java/ru/ulstu/extractor/service/GitRepositoryService.java
+++ b/src/main/java/ru/ulstu/extractor/service/GitRepositoryService.java
@@ -1,16 +1,18 @@
 package ru.ulstu.extractor.service;
 
+import org.eclipse.jgit.api.CreateBranchCommand;
 import org.eclipse.jgit.api.Git;
 import org.eclipse.jgit.api.ListBranchCommand;
 import org.eclipse.jgit.api.errors.GitAPIException;
 import org.eclipse.jgit.diff.DiffFormatter;
 import org.eclipse.jgit.internal.storage.file.FileRepository;
+import org.eclipse.jgit.lib.Ref;
 import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.revwalk.RevCommit;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Service;
+import ru.ulstu.extractor.model.Author;
 import ru.ulstu.extractor.model.Branch;
-import ru.ulstu.extractor.model.Changes;
 import ru.ulstu.extractor.model.Commit;
 import ru.ulstu.extractor.model.FileChange;
 import ru.ulstu.extractor.model.LineChange;
@@ -68,13 +70,19 @@ public class GitRepositoryService {
         return file.exists();
     }
 
-    public List<Commit> getCommits(String url) throws GitAPIException, IOException {
-        cloneOrUpdateRepo(url);
-        Repository localRepo = new FileRepository(getProjectGitDirectory(url));
+    public List<Commit> getCommits(String repositoryUrl, String branchName) throws GitAPIException, IOException {
+        cloneOrUpdateRepo(repositoryUrl);
+        Repository localRepo = new FileRepository(getProjectGitDirectory(repositoryUrl));
         Git git = new Git(localRepo);
         git.pull().call();
+        Ref ref = git.checkout().
+                setCreateBranch(true).
+                setName(branchName).
+                setUpstreamMode(CreateBranchCommand.SetupUpstreamMode.TRACK).
+                setStartPoint("origin/" + branchName).
+                call();
+
         List<RevCommit> commits = new ArrayList<>();
-        //TODO: сделать преобразование в коллекцию "наших объектов"
         git.log().call().forEach(commits::add);
 
         List<Commit> list = new ArrayList<>();
@@ -82,10 +90,10 @@ public class GitRepositoryService {
         for (RevCommit revCommit : commits) {
             Commit commit = new Commit(
                     revCommit.getFullMessage(),
-                    revCommit.getAuthorIdent().getName(),
+                    new Author(revCommit.getAuthorIdent().getName()),
                     Date.from(Instant.ofEpochSecond(revCommit.getCommitTime())));
             if (prevCommit != null) {
-                commit.setChanges(findDiffBetweenTwoRevisions(revCommit, prevCommit, localRepo));
+                commit.setFileChanges(findDiffBetweenTwoRevisions(revCommit, prevCommit, localRepo));
             }
             list.add(commit);
             prevCommit = revCommit;
@@ -93,7 +101,7 @@ public class GitRepositoryService {
         return list;
     }
 
-    public Changes findDiffBetweenTwoRevisions(RevCommit laterCommit, RevCommit earlierCommit, Repository localRepo) {
+    public List<FileChange> findDiffBetweenTwoRevisions(RevCommit laterCommit, RevCommit earlierCommit, Repository localRepo) {
         if (laterCommit == null || earlierCommit == null) {
             return null;
         }
@@ -109,8 +117,8 @@ public class GitRepositoryService {
         return parseOutputDiff(output);
     }
 
-    private Changes parseOutputDiff(String output) {
-        Changes changes = new Changes();
+    private List<FileChange> parseOutputDiff(String output) {
+        List<FileChange> changes = new ArrayList<>();
         String[] strings = output.split("\n");
         FileChange fileChange = new FileChange();
         int stringsLength = strings.length - 1;
@@ -121,7 +129,7 @@ public class GitRepositoryService {
                     fileChange = new FileChange();
                     fileChange.setFile(maybeFileName.get());
                     /// вытащить другие изменения из коммита
-                    changes.getFileChanges().add(fileChange);
+                    changes.add(fileChange);
                 }
                 LineChange lineChange = new LineChange();
                 if (strings[i].startsWith("-")) {
diff --git a/src/main/java/ru/ulstu/extractor/service/IndexService.java b/src/main/java/ru/ulstu/extractor/service/IndexService.java
new file mode 100644
index 0000000..113a70b
--- /dev/null
+++ b/src/main/java/ru/ulstu/extractor/service/IndexService.java
@@ -0,0 +1,41 @@
+package ru.ulstu.extractor.service;
+
+import com.sun.istack.NotNull;
+import org.eclipse.jgit.api.errors.GitAPIException;
+import org.springframework.stereotype.Service;
+import ru.ulstu.extractor.model.Branch;
+import ru.ulstu.extractor.model.Commit;
+import ru.ulstu.extractor.model.Repository;
+import ru.ulstu.extractor.repository.BranchRepository;
+import ru.ulstu.extractor.repository.CommitRepository;
+import ru.ulstu.extractor.repository.RepositoryRepository;
+
+import java.io.IOException;
+import java.util.List;
+
+@Service
+public class IndexService {
+    private final GitRepositoryService gitRepositoryService;
+    private final RepositoryRepository repositoryRepository;
+    private final BranchRepository branchRepository;
+    private final CommitRepository commitRepository;
+
+    public IndexService(GitRepositoryService gitRepositoryService,
+                        RepositoryRepository repositoryRepository,
+                        BranchRepository branchRepository,
+                        CommitRepository commitRepository) {
+        this.gitRepositoryService = gitRepositoryService;
+        this.repositoryRepository = repositoryRepository;
+        this.branchRepository = branchRepository;
+        this.commitRepository = commitRepository;
+    }
+
+    public void index(@NotNull String repositoryUrl, @NotNull String branchName) throws GitAPIException, IOException {
+        Repository repository = repositoryRepository.findByUrl(repositoryUrl)
+                .orElse(repositoryRepository.save(new Repository(repositoryUrl)));
+        Branch branch = branchRepository.findByRepositoryAndName(repository, branchName)
+                .orElse(branchRepository.save(new Branch(repository, branchName)));
+        List<Commit> commits = gitRepositoryService.getCommits(repositoryUrl, branchName);
+        branch.setCommits(commits);
+    }
+}
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index f061be5..938472e 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -11,6 +11,9 @@ spring.datasource.url=jdbc:postgresql://localhost:5432/repo
 spring.datasource.username=postgres
 spring.datasource.password=postgres
 spring.datasource.driverclassName=org.postgresql.Driver
+spring.jpa.hibernate.ddl-auto=validate
+spring.jpa.database-platform=org.hibernate.dialect.PostgreSQLDialect
+spring.jpa.properties.hibernate.temp.use_jdbc_metadata_defaults=false
 # Liquibase Settings
 spring.liquibase.drop-first=false
 spring.liquibase.enabled=true
diff --git a/src/main/resources/db/changelog-20210329_120000-schema.xml b/src/main/resources/db/changelog-20210329_120000-schema.xml
new file mode 100644
index 0000000..78b1cc4
--- /dev/null
+++ b/src/main/resources/db/changelog-20210329_120000-schema.xml
@@ -0,0 +1,38 @@
+<?xml version="1.1" encoding="UTF-8" standalone="no"?>
+<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
+                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+                   xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.1.xsd">
+    <changeSet author="orion" id="20210329-120000-1">
+        <addColumn tableName="repository">
+            <column name="version" type="integer"/>
+        </addColumn>
+        <addColumn tableName="branch">
+            <column name="version" type="integer"/>
+        </addColumn>
+        <addColumn tableName="commit">
+            <column name="version" type="integer"/>
+        </addColumn>
+        <addColumn tableName="author">
+            <column name="version" type="integer"/>
+        </addColumn>
+    </changeSet>
+    <changeSet author="orion" id="20210329-120000-2">
+        <addColumn tableName="file_change">
+            <column name="version" type="integer"/>
+        </addColumn>
+        <addColumn tableName="line_change">
+            <column name="version" type="integer"/>
+        </addColumn>
+    </changeSet>
+    <changeSet author="orion" id="20210329-120000-3" objectQuotingStrategy="QUOTE_ALL_OBJECTS">
+        <createTable tableName="hibernate_sequences">
+            <column name="sequence_name" type="VARCHAR(255)">
+                <constraints nullable="false"/>
+            </column>
+            <column name="sequence_next_hi_value" type="BIGINT"/>
+            <column name="next_val" type="bigint"/>
+        </createTable>
+        <addPrimaryKey columnNames="sequence_name" constraintName="hibernate_sequences_pkey"
+                       tableName="hibernate_sequences"/>
+    </changeSet>
+</databaseChangeLog>
\ No newline at end of file
diff --git a/src/main/resources/db/changelog-master.xml b/src/main/resources/db/changelog-master.xml
index 90a3c94..0ddc390 100644
--- a/src/main/resources/db/changelog-master.xml
+++ b/src/main/resources/db/changelog-master.xml
@@ -5,4 +5,5 @@
                         http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.1.xsd">
     <include file="db/changelog-20210317_140000-schema.xml"/>
     <include file="db/changelog-20210326_170000-schema.xml"/>
+    <include file="db/changelog-20210329_120000-schema.xml"/>
 </databaseChangeLog>