diff --git a/generator/idl_parser/idls.ts b/generator/idl_parser/idls.ts
index b192dbe..2a09aeb 100644
--- a/generator/idl_parser/idls.ts
+++ b/generator/idl_parser/idls.ts
@@ -26,11 +26,22 @@ export interface InterfaceMember extends TypedIdentifier {
   arguments: Array<Argument>;
 }
 
-export interface Interface {
+const enum DefinitionType {
+  Interface,
+  Enum,
+}
+
+export interface Definition {
   name: string;
+  type: DefinitionType;
+}
+
+export interface Interface extends Definition {
   members: Array<InterfaceMember>;
 }
 
+export interface Enum extends Definition {}
+
 export class ArgumentImpl implements Argument {
   name: string;
   type: string;
@@ -64,13 +75,43 @@ export class InterfaceMemberImpl implements InterfaceMember {
 export class InterfaceImpl implements Interface {
   name: string;
   members: Array<InterfaceMemberImpl>;
+  type: DefinitionType;
 
-  constructor(raw_idl_info: any) {
-    this.name = raw_idl_info.name;
+  constructor(interface_info: any) {
+    this.name = interface_info.name;
+    this.type = DefinitionType.Interface;
 
     this.members = new Array<InterfaceMemberImpl>();
-    raw_idl_info.members.forEach(member => {
+    interface_info.members.forEach(member => {
       this.members.push(new InterfaceMemberImpl(member));
     });
   }
 }
+
+export class EnumImpl implements Enum {
+  name: string;
+  type: DefinitionType;
+
+  // FIXME(hwanseung): should be implement Enum
+  constructor(enum_info: any) {
+    this.name = enum_info.name;
+    this.type = DefinitionType.Enum;
+  }
+}
+
+export class Fragments {
+  definitions: Array<Definition>;
+
+  constructor(raw_idl_infos: any) {
+    raw_idl_infos.forEach(raw_idl_info => {
+      this.definitions = new Array<Definition>();
+      if (raw_idl_info['type'] == 'interface') {
+        this.definitions.push(new InterfaceImpl(raw_idl_info));
+      } else if (raw_idl_info['type'] == 'enum') {
+        this.definitions.push(new EnumImpl(raw_idl_info));
+      } else {
+        // FIXME: should implement dictionaries, typedefs or etc.
+      }
+    });
+  }
+}
\ No newline at end of file
diff --git a/generator/main.ts b/generator/main.ts
index e550200..a7e804f 100644
--- a/generator/main.ts
+++ b/generator/main.ts
@@ -27,7 +27,7 @@ async function generateInterface(
     env: nunjucks.Environment, input_idl_path: string, output_path: string) {
   const parsedData =
       webidl.parse(await file.read(path.resolve(input_idl_path)));
-  const idl_interface: idls.Interface = new idls.InterfaceImpl(parsedData[0]);
+  const idl_fragments: idls.Fragments = new idls.Fragments(parsedData);
 
   const [header_tmpl, cpp_tmpl] = await Promise.all([
     file.read(path.resolve(TEMPLATE_DIR, 'interface_header.njk')),
@@ -37,9 +37,14 @@ async function generateInterface(
   const header_file_path = path.resolve(output_path, idl_name + '_bridge.h');
   const cpp_file_path = path.resolve(output_path, idl_name + '_bridge.cc');
 
+  // FIXME: each files can have one more interfaces. and this definition should
+  // be distinguished it is interface or not.
   return Promise.all([
-    file.write(header_file_path, env.renderString(header_tmpl, idl_interface)),
-    file.write(cpp_file_path, env.renderString(cpp_tmpl, idl_interface))
+    file.write(
+        header_file_path,
+        env.renderString(header_tmpl, idl_fragments.definitions[0])),
+    file.write(
+        cpp_file_path, env.renderString(cpp_tmpl, idl_fragments.definitions[0]))
   ]);
 }