diff --git a/packages/mdc-checkbox/foundation.js b/packages/mdc-checkbox/foundation.js
index 7664aca45f2..716995d1fdd 100644
--- a/packages/mdc-checkbox/foundation.js
+++ b/packages/mdc-checkbox/foundation.js
@@ -80,6 +80,7 @@ class MDCCheckboxFoundation extends MDCFoundation {
       () => this.handleChange());
   }
 
+  /** @override */
   init() {
     this.currentCheckState_ = this.determineCheckState_(this.getNativeControl_());
     this.updateAriaChecked_();
@@ -88,6 +89,7 @@ class MDCCheckboxFoundation extends MDCFoundation {
     this.installPropertyChangeHooks_();
   }
 
+  /** @override */
   destroy() {
     this.adapter_.deregisterChangeHandler(this.changeHandler_);
     this.uninstallPropertyChangeHooks_();
diff --git a/packages/mdc-ripple/foundation.js b/packages/mdc-ripple/foundation.js
index bd5d6edffbc..4f97c573e71 100644
--- a/packages/mdc-ripple/foundation.js
+++ b/packages/mdc-ripple/foundation.js
@@ -194,6 +194,7 @@ class MDCRippleFoundation extends MDCFoundation {
     };
   }
 
+  /** @override */
   init() {
     if (!this.isSupported_()) {
       return;
@@ -211,6 +212,7 @@ class MDCRippleFoundation extends MDCFoundation {
     });
   }
 
+  /** @override */
   destroy() {
     if (!this.isSupported_()) {
       return;
diff --git a/packages/mdc-ripple/index.js b/packages/mdc-ripple/index.js
index 46cfe17c249..d2233d840b0 100644
--- a/packages/mdc-ripple/index.js
+++ b/packages/mdc-ripple/index.js
@@ -114,11 +114,15 @@ class MDCRipple extends MDCComponent {
     this.foundation_.layout();
   }
 
-  /** @return {!MDCRippleFoundation} */
+  /**
+   * @return {!MDCRippleFoundation}
+   * @override
+   */
   getDefaultFoundation() {
     return new MDCRippleFoundation(MDCRipple.createAdapter(this));
   }
 
+  /** @override */
   initialSyncWithDOM() {
     this.unbounded = 'mdcRippleIsUnbounded' in this.root_.dataset;
   }