Добавлены классы для пакетов и паттернов

src/main/java/ru/serega6531/packmate/service/PatternService.java

@@ -0,0 +1,33 @@
+package ru.serega6531.packmate.service;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.web.bind.annotation.*;
+import ru.serega6531.packmate.model.Pattern;
+import ru.serega6531.packmate.repository.PatternRepository;
+
+import java.util.List;
+
+@Service
+public class PatternService {
+
+    private final PatternRepository repository;
+
+    @Autowired
+    public PatternService(PatternRepository repository) {
+        this.repository = repository;
+    }
+
+    public List<Pattern> findAll() {
+        return repository.findAll();
+    }
+
+    public void deleteById(int id) {
+        repository.deleteById(id);
+    }
+
+    public Pattern save(Pattern service) {
+        return repository.save(service);
+    }
+
+}