diff --git a/languages/javalang/builder-renderer/java-builder-client/src/main/kotlin/io/vrap/codegen/languages/javalang/client/builder/producers/JavaModelClassFileProducer.kt b/languages/javalang/builder-renderer/java-builder-client/src/main/kotlin/io/vrap/codegen/languages/javalang/client/builder/producers/JavaModelClassFileProducer.kt
index 4a4a9519..dbdce596 100644
--- a/languages/javalang/builder-renderer/java-builder-client/src/main/kotlin/io/vrap/codegen/languages/javalang/client/builder/producers/JavaModelClassFileProducer.kt
+++ b/languages/javalang/builder-renderer/java-builder-client/src/main/kotlin/io/vrap/codegen/languages/javalang/client/builder/producers/JavaModelClassFileProducer.kt
@@ -1,5 +1,6 @@
 package io.vrap.codegen.languages.javalang.client.builder.producers
 
+import com.google.common.collect.Lists
 import io.vrap.codegen.languages.extensions.isPatternProperty
 import io.vrap.codegen.languages.extensions.toComment
 import io.vrap.codegen.languages.java.base.JavaSubTemplates
@@ -12,10 +13,8 @@ import io.vrap.rmf.codegen.rendering.utils.keepIndentation
 import io.vrap.rmf.codegen.types.VrapArrayType
 import io.vrap.rmf.codegen.types.VrapObjectType
 import io.vrap.rmf.codegen.types.VrapTypeProvider
-import io.vrap.rmf.raml.model.types.BooleanInstance
-import io.vrap.rmf.raml.model.types.ObjectType
-import io.vrap.rmf.raml.model.types.Property
-import io.vrap.rmf.raml.model.types.UnionType
+import io.vrap.rmf.raml.model.types.*
+import io.vrap.rmf.raml.model.types.Annotation
 
 
 class JavaModelClassFileProducer constructor(override val vrapTypeProvider: VrapTypeProvider, @AllObjectTypes private val allObjectTypes: List<ObjectType>) : JavaObjectTypeExtensions, JavaEObjectTypeExtensions, FileProducer {
@@ -28,6 +27,17 @@ class JavaModelClassFileProducer constructor(override val vrapTypeProvider: Vrap
 
         val vrapType = vrapTypeProvider.doSwitch(type).toJavaVType() as VrapObjectType
 
+        val implements = Lists.newArrayList(vrapType.simpleClassName, "ModelBase")
+                .plus(
+                        when (val ex = type.getAnnotation("java-impl-implements") ) {
+                            is Annotation -> {
+                                (ex.value as StringInstance).value.escapeAll()
+                            }
+                            else -> null
+                        }
+                )
+                .filterNotNull()
+
         val content = """
                 |package ${vrapType.`package`.toJavaPackage()};
                 |
@@ -53,7 +63,7 @@ class JavaModelClassFileProducer constructor(override val vrapTypeProvider: Vrap
                 | */
                 |<${JavaSubTemplates.generatedAnnotation}>${if (type.markDeprecated()) """
                 |@Deprecated""" else ""}
-                |public class ${vrapType.simpleClassName}Impl implements ${vrapType.simpleClassName}, ModelBase {
+                |public class ${vrapType.simpleClassName}Impl implements ${implements.joinToString(separator = ", ")} {
                 |
                 |    <${type.beanFields().escapeAll()}>
                 |
@@ -65,6 +75,7 @@ class JavaModelClassFileProducer constructor(override val vrapTypeProvider: Vrap
                 |
                 |    <${type.equalsMethod().escapeAll()}>
                 |
+                |    <${type.getAnnotation("java-impl-mixin")?.value?.value?.let { (it as String).escapeAll()} ?: ""}>
                 |}
         """.trimMargin().keepIndentation()
         return TemplateFile(