reformatted as per standard formatter and incorporated review comments.

spring-boot-modules/spring-boot-hexagonal/pom.xml

@@ -42,24 +42,6 @@
 					<classifier>exec</classifier>
 				</configuration>
 			</plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-assembly-plugin</artifactId>
-                <configuration>
-                    <descriptorRefs>
-                        <descriptorRef>jar-with-dependencies</descriptorRef>
-                    </descriptorRefs>
-                </configuration>
-                <executions>
-                    <execution>
-                        <id>make-assembly</id>
-                        <phase>package</phase>
-                        <goals>
-                            <goal>single</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
 		</plugins>
 	</build>
 

spring-boot-modules/spring-boot-hexagonal/src/main/java/com/baeldung/adapter/DocumentRepositoryImpl.java

@@ -3,7 +3,7 @@ package com.baeldung.adapter;
 import org.springframework.stereotype.Repository;
 
 import com.baeldung.domain.Document;
-import com.baeldung.port.DocumentRepo;
+import com.baeldung.domain.port.DocumentRepo;
 
 import java.util.HashMap;
 import java.util.Map;

spring-boot-modules/spring-boot-hexagonal/src/main/java/com/baeldung/adapter/DocumentRestAdapter.java

@@ -1,11 +1,10 @@
 package com.baeldung.adapter;
 
-
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 
 import com.baeldung.domain.Document;
-import com.baeldung.port.DocumentService;
+import com.baeldung.domain.port.DocumentService;
 
 @RestController
 @RequestMapping("/doc")

spring-boot-modules/spring-boot-hexagonal/src/main/java/com/baeldung/domain/Document.java

@@ -7,15 +7,17 @@ public class Document {
     public String getId() {
         return id;
     }
+
     public void setId(String id) {
         this.id = id;
     }
+
     public String getData() {
         return data;
     }
+
     public void setData(String data) {
         this.data = data;
     }
 
-	
 }

spring-boot-modules/spring-boot-hexagonal/src/main/java/com/baeldung/domain/port/DocumentRepo.java

@@ -0,0 +1,9 @@
+package com.baeldung.domain.port;
+
+import com.baeldung.domain.Document;
+
+public interface DocumentRepo {
+    void storeDocument(Document document);
+
+    Document findDocumentById(String id);
+}

spring-boot-modules/spring-boot-hexagonal/src/main/java/com/baeldung/domain/port/DocumentService.java

@@ -0,0 +1,11 @@
+package com.baeldung.domain.port;
+
+import com.baeldung.domain.Document;
+
+public interface DocumentService {
+
+    void createDocument(Document document);
+
+    Document findById(String id);
+
+}

spring-boot-modules/spring-boot-hexagonal/src/main/java/com/baeldung/domain/port/impl/DocumentServiceImpl.java

@@ -0,0 +1,25 @@
+package com.baeldung.domain.port.impl;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import com.baeldung.domain.Document;
+import com.baeldung.domain.port.DocumentRepo;
+import com.baeldung.domain.port.DocumentService;
+
+@Service
+public class DocumentServiceImpl implements DocumentService {
+
+    @Autowired
+    private DocumentRepo documentRepo;
+
+    @Override
+    public void createDocument(Document document) {
+        documentRepo.storeDocument(document);
+    }
+
+    @Override
+    public Document findById(String id) {
+        return documentRepo.findDocumentById(id);
+    }
+}

spring-boot-modules/spring-boot-hexagonal/src/main/java/com/baeldung/port/DocumentRepo.java

@@ -1,10 +0,0 @@
-package com.baeldung.port;
-
-import com.baeldung.domain.Document;
-
-public interface DocumentRepo {
-	void storeDocument(Document document);
-	
-	Document findDocumentById(String id);
-}
-

spring-boot-modules/spring-boot-hexagonal/src/main/java/com/baeldung/port/DocumentService.java

@@ -1,11 +0,0 @@
-package com.baeldung.port;
-
-import com.baeldung.domain.Document;
-
-public interface DocumentService {
-	
-	void createDocument(Document document);
-	
-	Document findById(String id);
-	
-}

spring-boot-modules/spring-boot-hexagonal/src/main/java/com/baeldung/port/impl/DocumentServiceImpl.java

@@ -1,25 +0,0 @@
-package com.baeldung.port.impl;
-
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.stereotype.Service;
-
-import com.baeldung.domain.Document;
-import com.baeldung.port.DocumentRepo;
-import com.baeldung.port.DocumentService;
-
-@Service
-public class DocumentServiceImpl implements DocumentService {
-	
-	@Autowired
-	private DocumentRepo documentRepo;
-	
-	@Override
-	public void createDocument(Document document) {
-		documentRepo.storeDocument(document);
-	}
-	
-	@Override
-	public Document findById(String id) {
-		return documentRepo.findDocumentById(id);
-	}
-}