Class diagram from use case diagram
<p>I have the following use case diagram</p>

<p><img src="https://i.stack.imgur.com/JyQRu.jpg" alt="Use case diagram"></p>

<p>What is the best way to create a class from this diagram?</p>

<p>I've tried creating two main classes (<code>UserManager</code> and <code>ContentManager</code>) but the whole class structure looks wrong and illogical.</p>

<p>Can anyone provide a simple example to help me?</p>

<p>[Edit] Below I've pasted my class diagram. What would you change or what do you think about it?</p>

<p><img src="https://i.stack.imgur.com/vxMXz.jpg" alt="My class diagram"></p>