diff --git a/pom.xml b/pom.xml
index 6bb1772..0994827 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,6 +26,7 @@
 
         <jib-maven-plugin.version>3.4.3</jib-maven-plugin.version>
         <micrometer-registry-prometheus.version>1.13.4</micrometer-registry-prometheus.version>
+        <archunit-junit5.version>1.3.0</archunit-junit5.version>
     </properties>
 
     <dependencyManagement>
@@ -35,6 +36,11 @@
                 <artifactId>micrometer-registry-prometheus</artifactId>
                 <version>${micrometer-registry-prometheus.version}</version>
             </dependency>
+            <dependency>
+                <groupId>com.tngtech.archunit</groupId>
+                <artifactId>archunit-junit5</artifactId>
+                <version>${archunit-junit5.version}</version>
+            </dependency>
         </dependencies>
     </dependencyManagement>
 
@@ -58,6 +64,11 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>com.tngtech.archunit</groupId>
+            <artifactId>archunit-junit5</artifactId>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>
diff --git a/src/main/java/tk/antoine/roux/Main.java b/src/main/java/tk/antoine/roux/Main.java
index 7045d2c..e842613 100644
--- a/src/main/java/tk/antoine/roux/Main.java
+++ b/src/main/java/tk/antoine/roux/Main.java
@@ -5,6 +5,8 @@ import org.slf4j.LoggerFactory;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
+import java.lang.invoke.MethodHandles;
+
 @SpringBootApplication
 public class Main {
 
diff --git a/src/main/java/tk/antoine/roux/domain/model/Either.java b/src/main/java/tk/antoine/roux/domain/model/Either.java
index 20d1272..360f6a5 100644
--- a/src/main/java/tk/antoine/roux/domain/model/Either.java
+++ b/src/main/java/tk/antoine/roux/domain/model/Either.java
@@ -1,10 +1,10 @@
 package tk.antoine.roux.domain.model;
 
-public final class Either<T> {
-    private final Exception error;
+public final class Either<E extends Exception, T> {
+    private final E error;
     private final T success;
 
-    private Either(Exception error, T success) {
+    private Either(E error, T success) {
         this.error = error;
         this.success = success;
     }
@@ -17,11 +17,11 @@ public final class Either<T> {
         return success;
     }
 
-    public static <T> Either<T> right(T success) {
+    public static <E extends Exception, T> Either<E, T> right(T success) {
         return new Either<>(null, success);
     }
 
-    public static <T> Either<T> left(Exception error) {
+    public static <E extends Exception, T> Either<E, T> left(E error) {
         return new Either<>(error, null);
     }
 
diff --git a/src/main/java/tk/antoine/roux/infrastructure/Manager.java b/src/main/java/tk/antoine/roux/infrastructure/Manager.java
index 10e74c5..b3338ce 100644
--- a/src/main/java/tk/antoine/roux/infrastructure/Manager.java
+++ b/src/main/java/tk/antoine/roux/infrastructure/Manager.java
@@ -3,14 +3,23 @@ package tk.antoine.roux.infrastructure;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ProblemDetail;
 import org.springframework.http.ResponseEntity;
+import org.springframework.web.ErrorResponse;
 import tk.antoine.roux.domain.model.Either;
 
 public interface Manager {
 
-    static <T> ResponseEntity<T> eitherToResponseEntity(Either<T> either, String errorMessage) {
+    static <E extends Exception, T> ResponseEntity<T> eitherToResponseEntity(Either<E, T> either, String errorMessage) {
         ResponseEntity<T> response;
-        if (either.isLeft()) {
-            ProblemDetail problemDetail = exceptionToProblemDetail(either, errorMessage);
+        if (either.isLeft() ) {
+
+            final ProblemDetail problemDetail;
+            if (either.left() instanceof ErrorResponse exception) {
+                problemDetail = exception.getBody();
+            } else {
+                problemDetail = ProblemDetail.forStatusAndDetail(HttpStatus.INTERNAL_SERVER_ERROR, either.left().getMessage());
+            }
+
+            problemDetail.setTitle(errorMessage);
             response = ResponseEntity.of(problemDetail).build();
         } else {
             response = ResponseEntity.ok(either.right());
@@ -18,10 +27,4 @@ public interface Manager {
         return response;
     }
 
-    private static ProblemDetail exceptionToProblemDetail(Either<?> either, String errorMessage) {
-        ProblemDetail problemDetail = ProblemDetail
-            .forStatusAndDetail(HttpStatus.BAD_REQUEST, either.left().getMessage());
-        problemDetail.setTitle(errorMessage);
-        return problemDetail;
-    }
 }
diff --git a/src/test/java/tk/antoine/roux/architecture/CleanArchitectureTest.java b/src/test/java/tk/antoine/roux/architecture/CleanArchitectureTest.java
new file mode 100644
index 0000000..15dc2eb
--- /dev/null
+++ b/src/test/java/tk/antoine/roux/architecture/CleanArchitectureTest.java
@@ -0,0 +1,46 @@
+package tk.antoine.roux.architecture;
+
+import com.tngtech.archunit.core.domain.JavaClasses;
+import com.tngtech.archunit.core.importer.ImportOption.DoNotIncludeArchives;
+import com.tngtech.archunit.core.importer.ImportOption.DoNotIncludeJars;
+import com.tngtech.archunit.core.importer.ImportOption.DoNotIncludePackageInfos;
+import com.tngtech.archunit.junit.AnalyzeClasses;
+import com.tngtech.archunit.junit.ArchTest;
+import com.tngtech.archunit.library.Architectures;
+
+/**
+ * Test of clean architecture package dependencies
+ */
+@AnalyzeClasses(packages = "tk.antoine.roux", importOptions = {
+    DoNotIncludeArchives.class,
+    DoNotIncludeJars.class,
+    DoNotIncludePackageInfos.class
+})
+class CleanArchitectureTest {
+
+    @ArchTest
+    void should_respect_clean_architecture_application_layer(JavaClasses classes) {
+        Architectures.layeredArchitecture()
+            .consideringAllDependencies()
+
+            //@formatter:off
+            .layer(Layer.DOMAIN.name).definedBy(Layer.DOMAIN.path)
+                .layer(Layer.MODEL.name).definedBy(Layer.MODEL.path)
+                .optionalLayer(Layer.REPOSITORIES.name).definedBy(Layer.REPOSITORIES.path)
+                .optionalLayer(Layer.USECASES.name).definedBy(Layer.USECASES.path)
+            .layer(Layer.INFRASTRUCTURE.name).definedBy(Layer.INFRASTRUCTURE.path)
+                .optionalLayer(Layer.ADAPTER_IN.name).definedBy(Layer.ADAPTER_IN.path)
+                .optionalLayer(Layer.ADAPTER_OUT.name).definedBy(Layer.ADAPTER_OUT.path)
+            //@formatter:on
+
+            .whereLayer(Layer.INFRASTRUCTURE.name).mayNotBeAccessedByAnyLayer()
+            .whereLayer(Layer.USECASES.name).mayOnlyBeAccessedByLayers(Layer.ADAPTER_IN.name)
+            .whereLayer(Layer.REPOSITORIES.name).mayOnlyBeAccessedByLayers(Layer.USECASES.name)
+            .whereLayer(Layer.MODEL.name).mayOnlyBeAccessedByLayers(Layer.INFRASTRUCTURE.name)
+            .whereLayer(Layer.ADAPTER_OUT.name).mayNotBeAccessedByAnyLayer()
+            .whereLayer(Layer.ADAPTER_OUT.name).mayNotAccessAnyLayer()
+
+            .check(classes);
+    }
+
+}
diff --git a/src/test/java/tk/antoine/roux/architecture/CodingGoodPracticeTest.java b/src/test/java/tk/antoine/roux/architecture/CodingGoodPracticeTest.java
new file mode 100644
index 0000000..56a45ae
--- /dev/null
+++ b/src/test/java/tk/antoine/roux/architecture/CodingGoodPracticeTest.java
@@ -0,0 +1,67 @@
+package tk.antoine.roux.architecture;
+
+import com.tngtech.archunit.core.domain.JavaClasses;
+import com.tngtech.archunit.core.importer.ClassFileImporter;
+import com.tngtech.archunit.lang.CompositeArchRule;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static com.tngtech.archunit.core.importer.ImportOption.Predefined.DO_NOT_INCLUDE_ARCHIVES;
+import static com.tngtech.archunit.core.importer.ImportOption.Predefined.DO_NOT_INCLUDE_JARS;
+import static com.tngtech.archunit.core.importer.ImportOption.Predefined.DO_NOT_INCLUDE_PACKAGE_INFOS;
+import static com.tngtech.archunit.core.importer.ImportOption.Predefined.DO_NOT_INCLUDE_TESTS;
+import static com.tngtech.archunit.library.GeneralCodingRules.NO_CLASSES_SHOULD_ACCESS_STANDARD_STREAMS;
+import static com.tngtech.archunit.library.GeneralCodingRules.NO_CLASSES_SHOULD_USE_FIELD_INJECTION;
+import static com.tngtech.archunit.library.GeneralCodingRules.NO_CLASSES_SHOULD_USE_JAVA_UTIL_LOGGING;
+import static com.tngtech.archunit.library.GeneralCodingRules.NO_CLASSES_SHOULD_USE_JODATIME;
+
+/**
+ * Tests of good practice coding usage
+ */
+class CodingGoodPracticeTest {
+    private static final String BASE_PACKAGE = "tk.antoine.roux";
+
+    ClassFileImporter classFileImporter = new ClassFileImporter()
+        .withImportOption(DO_NOT_INCLUDE_ARCHIVES)
+        .withImportOption(DO_NOT_INCLUDE_JARS)
+        .withImportOption(DO_NOT_INCLUDE_PACKAGE_INFOS);
+
+    JavaClasses classes = classFileImporter
+        .importPackages(BASE_PACKAGE);
+
+    JavaClasses classesWithoutTest = classFileImporter
+        .withImportOption(DO_NOT_INCLUDE_TESTS)
+        .importPackages(BASE_PACKAGE);
+
+    @Test
+    @DisplayName("Should prevent field injection everywhere, except in test")
+    void preventFieldInjection() {
+        CompositeArchRule commonUsageRules = CompositeArchRule
+            .of(NO_CLASSES_SHOULD_USE_FIELD_INJECTION);
+        commonUsageRules.check(classesWithoutTest);
+    }
+
+    @Test
+    @DisplayName("Should prevent usage of system stream like out, err, in")
+    void preventSystemStream() {
+        CompositeArchRule commonUsageRules = CompositeArchRule
+            .of(NO_CLASSES_SHOULD_ACCESS_STANDARD_STREAMS);
+        commonUsageRules.check(classes);
+    }
+
+    @Test
+    @DisplayName("Should prevent usage of Java.util.logging classes")
+    void preventJavaUtilLogging() {
+        CompositeArchRule commonUsageRules = CompositeArchRule
+            .of(NO_CLASSES_SHOULD_USE_JAVA_UTIL_LOGGING);
+        commonUsageRules.check(classes);
+    }
+
+    @Test
+    @DisplayName("Should prevent usage of JodaTime library")
+    void preventJodaTime() {
+        CompositeArchRule commonUsageRules = CompositeArchRule
+            .of(NO_CLASSES_SHOULD_USE_JODATIME);
+        commonUsageRules.check(classes);
+    }
+}
diff --git a/src/test/java/tk/antoine/roux/architecture/Layer.java b/src/test/java/tk/antoine/roux/architecture/Layer.java
new file mode 100644
index 0000000..7e3d47b
--- /dev/null
+++ b/src/test/java/tk/antoine/roux/architecture/Layer.java
@@ -0,0 +1,20 @@
+package tk.antoine.roux.architecture;
+
+public enum Layer {
+    DOMAIN("domain", "tk.antoine.roux.domain.."),
+    MODEL("model", "tk.antoine.roux.domain.model.."),
+    REPOSITORIES("repositories", "tk.antoine.roux.domain.repositories.."),
+    USECASES("usecases", "tk.antoine.roux.domain.usecases.."),
+    INFRASTRUCTURE("infrastructure", "tk.antoine.roux.infrastructure.."),
+    ADAPTER_IN("adapter_in", "tk.antoine.roux.infrastructure.in.."),
+    ADAPTER_OUT("adapter_out", "tk.antoine.roux.infrastructure.out..")
+    ;
+
+    public final String name;
+    public final String path;
+
+    Layer(String name, String path) {
+        this.name = name;
+        this.path = path;
+    }
+}
diff --git a/src/test/resources/archunit.properties b/src/test/resources/archunit.properties
new file mode 100644
index 0000000..d93e375
--- /dev/null
+++ b/src/test/resources/archunit.properties
@@ -0,0 +1 @@
+junit.displayName.replaceUnderscoresBySpaces=true