Magento 2 Model, Resource Model, Collection

app\code\Ciptaloka\HelloWorld\Block\Catalog\Product\HelloWorld.php

<?php
/**
 * @author      Rizki Pratama @ciptaloka.com
 * @copyright   Copyright (c) 2017 Ciptaloka (http://ciptaloka.com)
 * @package     Ciptaloka_HelloWorld
 */
namespace Ciptaloka\HelloWorld\Block\Catalog\Product;

use \Magento\Framework\View\Element\Template;
use \Magento\Framework\View\Element\Template\Context;
use \Magento\Framework\ObjectManagerInterface;
use \Ciptaloka\HelloWorld\Helper\ConfigurationHelper;

class HelloWorld extends Template
{
    /**
     * @var ConfigurationHelper
     */
    protected $_helper;

    /**
     * @var ObjectManagerInterface
     */
    protected $_objectManager;

    public function __construct(
        Context $context,
        array $data = [],
        ConfigurationHelper $helper,
        ObjectManagerInterface $objectManager
    ) {
		parent::__construct($context, $data);
		$this->_helper = $helper;
		$this->_objectManager = $objectManager;
	}

    /**
     * Returns 'Hello World!' string
     *
     * @return \Magento\Framework\Phrase
     */
	public function getHelloWorldTxt()
    {
        return __('Hello World!');
    }

    public function getBlockLabel()
    {
        return $this->_helper->getBlockLabel();
    }

    public function getTextAlign()
    {
        return $this->_helper->getTextAlign();
    }

    /**
     * Proceed return the block output if the `Enable Hello World`
     * configuration is set to `Yes`, otherwise just return empty string.
     *
     * @return string
     */
    protected function _toHtml()
    {
        if ($this->_helper->getEnable()) {
            return parent::_toHtml();
        }
        else {
            return '';
        }
    }

    public function getCollection()
    {
        $model = $this->_objectManager->create('Ciptaloka\HelloWorld\Model\HelloWorld');
        $collection = $model->getCollection();

        return $collection;
    }
}

app\code\Ciptaloka\HelloWorld\Model\HelloWorld.php

<?php
/**
 * @author      Rizki Pratama @ciptaloka.com
 * @copyright   Copyright (c) 2017 Ciptaloka (http://ciptaloka.com)
 * @package     Ciptaloka_HelloWorld
 */
namespace Ciptloka\HelloWorld\Model;

use Magento\Framework\Model\AbstractModel;
use Magento\Framework\Model\Context;
use Magento\Framework\Model\ResourceModel\AbstractResource;
use Magento\Framework\Data\Collection\AbstractDb;
use Magento\Framework\Registry;

class HelloWorld extends AbstractModel
{
    /**
     * Parent constructor
     *
     * @param Context $context
     * @param Registry $registry
     * @param AbstractResource|null $resource
     * @param AbstractDb|null $resourceCollection
     * @param array $data
     */
    public function __construct(
        Context $context,
        Registry $registry,
        AbstractResource $resource = null,
        AbstractDb $resourceCollection = null,
        array $data = []
    ) {
        parent::__construct($context, $registry, $resource, $resourceCollection, $data);
    }

    /**
     * Model constructor
     */
    protected function _construct()
    {
        $this->_init('Ciptaloka\HelloWorld\Model\ResourceModel\HelloWorld');
    }
}

app\code\Ciptaloka\HelloWorld\Model\ResourceModel\HelloWorld.php

<?php
/**
 * @author      Rizki Pratama @ciptaloka.com
 * @copyright   Copyright (c) 2017 Ciptaloka (http://ciptaloka.com)
 * @package     Ciptaloka_HelloWorld
 */
namespace Ciptaloka\HelloWorld\Model\ResourceModel;

use Magento\Framework\Model\ResourceModel\Db\AbstractDb;

class HelloWorld extends AbstractDb
{
    /**
     * Model initialization
     *
     * @return void
     */
    protected function _construct()
    {
        $this->_init('ciptaloka_helloworld', 'id');
    }
}

app\code\Ciptaloka\HelloWorld\Model\ResourceModel\HelloWorld\Collection.php

<?php
/**
 * @author      Rizki Pratama @ciptaloka.com
 * @copyright   Copyright (c) 2017 Ciptaloka (http://ciptaloka.com)
 * @package     Ciptaloka_HelloWorld
 */
namespace Ciptaloka\HelloWorld\Model\ResourceModel\HelloWorld;

use \Magento\Framework\Model\ResourceModel\Db\Collection\AbstractCollection;

class Collection extends AbstractCollection
{
    /**
     * Collection constructor
     */
    protected function _construct()
    {
        $this->_init(
            'Ciptaloka\HelloWorld\Model\HelloWorld',
            'Ciptaloka\HelloWorld\Model\ResourceModel\HelloWorld'
        );
    }
}

app\code\Ciptaloka\HelloWorld\view\frontend\templates\product\hello.phtml

<?php
/**
 * @author      Rizki Pratama @ciptaloka.com
 * @copyright   Copyright (c) 2017 Ciptaloka (http://ciptaloka.com)
 * @package     Ciptaloka_HelloWorld
 */
?>
<div class="ciptaloka-helloworld-block" style="text-align: <?= $this->getTextAlign(); ?>;">
    <p><?= $this->getHelloWorldTxt() . " -- <b>" . $this->getBlockLabel() . "</b>"; ?></p>
    <ul>
        <?php foreach ($this->getCollection() as $item) { ?>
            <li><small><b><?= $item->getLabel(); ?></b>: <?= $item->getValue(); ?></small></li>
        <?php } ?>
    </ul>
</div>