I'm getting the following error when I save the quickcontact.cmp file:
Failed to save undefined: Invalid definition for null:QuickContactController: null: Source

Below is the code in the file:
<aura:component implements="force:lightningQuickActionWithoutHeader,force:hasRecordId" controller="QuickContactController">
    <aura:attribute name="account" type="Account" />
    <aura:attribute name="newContact" type="Contact"
        default="{ 'sobjectType': 'Contact' }" /> <!-- default to empty record -->
    <aura:attribute name="hasErrors" type="Boolean"
        description="Indicate if there were failures when validating the contact." />
    <aura:handler name="init" value="{!this}" action="{!c.doInit}" />
    <!-- Display a header with details about the account -->
    <div class="slds-page-header" role="banner">
        <p class="slds-text-heading--label">{!v.account.Name}</p>
        <h1 class="slds-page-header__title slds-m-right--small
            slds-truncate slds-align-left">Create New Contact</h1>
    </div>
    <!-- Display form validation errors, if any -->
    <aura:if isTrue="{!v.hasErrors}">
        <div class="recordSaveError">
            <ui:message title="Error" severity="error" closable="true">
                The new contact can't be saved because it's not valid.
                Please review and correct the errors in the form.
            </ui:message>
        </div>
    </aura:if>
    <!-- Display the new contact form -->
    <div class="slds-form--stacked">
        <div class="slds-form-element">
            <label class="slds-form-element__label"
                for="contactFirstName">First Name: </label>
            <div class="slds-form-element__control">
              <ui:inputText class="slds-input" aura:id="contactFirstName"
                value="{!v.newContact.FirstName}" required="true"/>
            </div>
        </div>
        <div class="slds-form-element">
            <label class="slds-form-element__label"
                for="contactLastName">Last Name: </label>
            <div class="slds-form-element__control">
              <ui:inputText class="slds-input" aura:id="contactLastName"
                value="{!v.newContact.LastName}" required="true"/>
            </div>
        </div>
        <div class="slds-form-element">
            <label class="slds-form-element__label" for="contactTitle">Title: </label>
            <div class="slds-form-element__control">
              <ui:inputText class="slds-input" aura:id="contactTitle"
                value="{!v.newContact.Title}" />
            </div>
        </div>
        <div class="slds-form-element">
            <label class="slds-form-element__label"
                for="contactPhone">Phone Number: </label>
            <div class="slds-form-element__control">
              <ui:inputPhone class="slds-input" aura:id="contactPhone"
                value="{!v.newContact.Phone}" required="true"/>
            </div>
        </div>
        <div class="slds-form-element">
            <label class="slds-form-element__label" for="contactEmail">Email: </label>
            <div class="slds-form-element__control">
              <ui:inputEmail class="slds-input" aura:id="contactEmail"
                value="{!v.newContact.Email}" />
            </div>
        </div>
        <div class="slds-form-element">
            <ui:button label="Cancel" press="{!c.handleCancel}"
                class="slds-button slds-button--neutral" />
            <ui:button label="Save Contact" press="{!c.handleSaveContact}"
                class="slds-button slds-button--brand" />
        </div>
    </div>
</aura:component>

Anyhelp would be great. I'm really new to this and a little lost on debugging with salesforce.