diff --git a/bobby-pay/membership-service/src/main/java/common/PersistenceAdapter.java b/bobby-pay/membership-service/src/main/java/common/PersistenceAdapter.java
new file mode 100644
index 00000000..eafb04a5
--- /dev/null
+++ b/bobby-pay/membership-service/src/main/java/common/PersistenceAdapter.java
@@ -0,0 +1,16 @@
+package common;
+
+import org.springframework.core.annotation.AliasFor;
+import org.springframework.stereotype.Component;
+
+import java.lang.annotation.*;
+
+@Target({ElementType.TYPE})
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+@Component
+public @interface PersistenceAdapter {
+
+    @AliasFor(annotation = Component.class)
+    String value() default "";
+}
diff --git a/bobby-pay/membership-service/src/main/java/common/SelfValidating.java b/bobby-pay/membership-service/src/main/java/common/SelfValidating.java
new file mode 100644
index 00000000..73317401
--- /dev/null
+++ b/bobby-pay/membership-service/src/main/java/common/SelfValidating.java
@@ -0,0 +1,21 @@
+package common;
+
+import javax.validation.*;
+import java.util.Set;
+
+public abstract class SelfValidating<T> {
+
+  private final Validator validator;
+
+  public SelfValidating() {
+    ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
+    validator = factory.getValidator();
+  }
+
+  protected void validateSelf() {
+    Set<ConstraintViolation<T>> violations = validator.validate((T) this);
+    if (!violations.isEmpty()) {
+      throw new ConstraintViolationException(violations);
+    }
+  }
+}
\ No newline at end of file
diff --git a/bobby-pay/membership-service/src/main/java/common/UseCase.java b/bobby-pay/membership-service/src/main/java/common/UseCase.java
new file mode 100644
index 00000000..767edf65
--- /dev/null
+++ b/bobby-pay/membership-service/src/main/java/common/UseCase.java
@@ -0,0 +1,16 @@
+package common;
+
+import org.springframework.core.annotation.AliasFor;
+import org.springframework.stereotype.Component;
+
+import java.lang.annotation.*;
+
+@Target({ElementType.TYPE})
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+@Component
+public @interface UseCase {
+
+    @AliasFor(annotation = Component.class)
+    String value() default "";
+}
diff --git a/bobby-pay/membership-service/src/main/java/common/WebAdapter.java b/bobby-pay/membership-service/src/main/java/common/WebAdapter.java
new file mode 100644
index 00000000..63f61044
--- /dev/null
+++ b/bobby-pay/membership-service/src/main/java/common/WebAdapter.java
@@ -0,0 +1,16 @@
+package common;
+
+import org.springframework.core.annotation.AliasFor;
+import org.springframework.stereotype.Component;
+
+import java.lang.annotation.*;
+
+@Target({ElementType.TYPE})
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+@Component
+public @interface WebAdapter {
+
+    @AliasFor(annotation = Component.class)
+    String value() default "";
+}