Symfony2 No mapping file found

am working on symfony2 and am geting this error:

No mapping file found named 'Acme.BlogBundle.Entity.Posts.php' for
class 'Acme\BlogBundle\Entity\Posts'. 500 Internal Server Error –
MappingException

I generate Entity php app/console doctrine:generate:entity

Name of entity: AcmeBlogBundle:Post

Format: php

All that i put in Acme:BlogBundle:Entity directory.

This is my Entity Post class with getter and setter methds:

<?php

namespace Acme\BlogBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * Posts
 */
class Posts
{
    /**
     * @var integer
     */
    private $id;

    /**
     * @var string
     */
    private $title;

    /**
     * @var string
     */
    private $shortText;

    /**
     * @var string
     */
    private $longText;

    /**
     * @var string
     */
    private $author;

    /**
     * @var \DateTime
     */
    private $dateCreated;

    /**
     * @var \DateTime
     */
    private $dateModified;


    /**
     * Get id
     *
     * @return integer 
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Set title
     *
     * @param string $title
     * @return Posts
     */
    public function setTitle($title)
    {
        $this->title = $title;

        return $this;
    }

    /**
     * Get title
     *
     * @return string 
     */
    public function getTitle()
    {
        return $this->title;
    }

    /**
     * Set shortText
     *
     * @param string $shortText
     * @return Posts
     */
    public function setShortText($shortText)
    {
        $this->shortText = $shortText;

        return $this;
    }

    /**
     * Get shortText
     *
     * @return string 
     */
    public function getShortText()
    {
        return $this->shortText;
    }

    /**
     * Set longText
     *
     * @param string $longText
     * @return Posts
     */
    public function setLongText($longText)
    {
        $this->longText = $longText;

        return $this;
    }

    /**
     * Get longText
     *
     * @return string 
     */
    public function getLongText()
    {
        return $this->longText;
    }

    /**
     * Set author
     *
     * @param string $author
     * @return Posts
     */
    public function setAuthor($author)
    {
        $this->author = $author;

        return $this;
    }

    /**
     * Get author
     *
     * @return string 
     */
    public function getAuthor()
    {
        return $this->author;
    }

    /**
     * Set dateCreated
     *
     * @param \DateTime $dateCreated
     * @return Posts
     */
    public function setDateCreated($dateCreated)
    {
        $this->dateCreated = $dateCreated;

        return $this;
    }

    /**
     * Get dateCreated
     *
     * @return \DateTime 
     */
    public function getDateCreated()
    {
        return $this->dateCreated;
    }

    /**
     * Set dateModified
     *
     * @param \DateTime $dateModified
     * @return Posts
     */
    public function setDateModified($dateModified)
    {
        $this->dateModified = $dateModified;

        return $this;
    }

    /**
     * Get dateModified
     *
     * @return \DateTime 
     */
    public function getDateModified()
    {
        return $this->dateModified;
    }
}

In my controller i first set Post Entity after definig namespace of controller.

use Acme\BlogBundle\Entity\Posts;

After that i create method

    public function AddAction()
    { 

        // $post = Acme\BlogBundle\Entity\Posts()

         $posts = new Posts();
         $posts->setTitle('Test Title');

         $em = $this->getDoctrine()->getManager();
         $em->persist($posts);
         $em->flush();
}

Here is and Stack Trace output

[1] Doctrine\Common\Persistence\Mapping\MappingException: No mapping
file found named 'Acme.BlogBundle.Entity.Posts.php' for class
'Acme\BlogBundle\Entity\Posts'.
at n/a
in /var/www/html/Symfony/vendor/doctrine/common/lib/Doctrine/Common/Persistence/Mapping/MappingException.php
line 74

at Doctrine\Common\Persistence\Mapping\MappingException::mappingFileNotFound('Acme\BlogBundle\Entity\Posts',
'Acme.BlogBundle.Entity.Posts.php')
in /var/www/html/Symfony/vendor/doctrine/common/lib/Doctrine/Common/Persistence/Mapping/Driver/DefaultFileLocator.php
line 117

at Doctrine\Common\Persistence\Mapping\Driver\DefaultFileLocator->findMappingFile('Acme\BlogBundle\Entity\Posts')
in /var/www/html/Symfony/vendor/doctrine/common/lib/Doctrine/Common/Persistence/Mapping/Driver/PHPDriver.php
line 59

at Doctrine\Common\Persistence\Mapping\Driver\PHPDriver->loadMetadataForClass('Acme\BlogBundle\Entity\Posts',
object(ClassMetadata))
in /var/www/html/Symfony/vendor/doctrine/common/lib/Doctrine/Common/Persistence/Mapping/Driver/MappingDriverChain.php
line 104

at Doctrine\Common\Persistence\Mapping\Driver\MappingDriverChain->loadMetadataForClass('Acme\BlogBundle\Entity\Posts',
object(ClassMetadata))
in /var/www/html/Symfony/vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/ClassMetadataFactory.php
line 113

at Doctrine\ORM\Mapping\ClassMetadataFactory->doLoadMetadata(object(ClassMetadata),

null, false, array())
in /var/www/html/Symfony/vendor/doctrine/common/lib/Doctrine/Common/Persistence/Mapping/AbstractClassMetadataFactory.php
line 302

at Doctrine\Common\Persistence\Mapping\AbstractClassMetadataFactory->loadMetadata('Acme\BlogBundle\Entity\Posts')
    in /var/www/html/Symfony/vendor/doctrine/common/lib/Doctrine/Common/Persistence/Mapping/AbstractClassMetadataFactory.php

line 205

at Doctrine\Common\Persistence\Mapping\AbstractClassMetadataFactory->getMetadataFor('Acme\BlogBundle\Entity\Posts')
in /var/www/html/Symfony/vendor/doctrine/orm/lib/Doctrine/ORM/EntityManager.php
line 268

at Doctrine\ORM\EntityManager->getClassMetadata('Acme\BlogBundle\Entity\Posts')
in /var/www/html/Symfony/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php
line 1580

at Doctrine\ORM\UnitOfWork->doPersist(object(Posts), array('000000000d824498000000009cdc8511' => object(Posts)))
in /var/www/html/Symfony/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php
line 1555

at Doctrine\ORM\UnitOfWork->persist(object(Posts))
in /var/www/html/Symfony/vendor/doctrine/orm/lib/Doctrine/ORM/EntityManager.php
line 565

at Doctrine\ORM\EntityManager->persist(object(Posts))
in /var/www/html/Symfony/src/Acme/BlogBundle/Controller/DefaultController.php
line 23

at Acme\BlogBundle\Controller\DefaultController->indexAction()
in line

at call_user_func_array(array(object(DefaultController), 'indexAction'), array())
in /var/www/html/Symfony/app/bootstrap.php.cache line 2815

at Symfony\Component\HttpKernel\HttpKernel->handleRaw(object(Request),
'1')
in /var/www/html/Symfony/app/bootstrap.php.cache line 2789

at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), '1',
true)
in /var/www/html/Symfony/app/bootstrap.php.cache line 2918

at Symfony\Component\HttpKernel\DependencyInjection\ContainerAwareHttpKernel->handle(object(Request),
'1', true)
in /var/www/html/Symfony/app/bootstrap.php.cache line 2220

at Symfony\Component\HttpKernel\Kernel->handle(object(Request))
in /var/www/html/Symfony/web/app_dev.php line 28

Update:

New Entity Test:

<?php
// src/Acme/BlogBundle/Entity/Test.php
namespace Acme\BlogBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Table()
 * @ORM\Entity
 */
class Test
{
    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var string
     *
     * @ORM\Column(name="title", type="string", length=255)
     */
    private $title;

    /**
     * @var string
     *
     * @ORM\Column(name="short_text", type="string", length=255)
     */
    private $shortText;

    /**
     * @var string
     *
     * @ORM\Column(name="long_text", type="text")
     */
    private $longText;

    /**
     * @var \DateTime
     *
     * @ORM\Column(name="date_created", type="datetime")
     */
    private $dateCreated;


    /**
     * Get id
     *
     * @return integer 
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Set title
     *
     * @param string $title
     * @return Test
     */
    public function setTitle($title)
    {
        $this->title = $title;

        return $this;
    }

    /**
     * Get title
     *
     * @return string 
     */
    public function getTitle()
    {
        return $this->title;
    }

    /**
     * Set shortText
     *
     * @param string $shortText
     * @return Test
     */
    public function setShortText($shortText)
    {
        $this->shortText = $shortText;

        return $this;
    }

    /**
     * Get shortText
     *
     * @return string 
     */
    public function getShortText()
    {
        return $this->shortText;
    }

    /**
     * Set longText
     *
     * @param string $longText
     * @return Test
     */
    public function setLongText($longText)
    {
        $this->longText = $longText;

        return $this;
    }

    /**
     * Get longText
     *
     * @return string 
     */
    public function getLongText()
    {
        return $this->longText;
    }

    /**
     * Set dateCreated
     *
     * @param \DateTime $dateCreated
     * @return Test
     */
    public function setDateCreated($dateCreated)
    {
        $this->dateCreated = $dateCreated;

        return $this;
    }

    /**
     * Get dateCreated
     *
     * @return \DateTime 
     */
    public function getDateCreated()
    {
        return $this->dateCreated;
    }
}

Again the some error

$ php app/console doctrine:generate:entities AcmeBlogBundle

Generating entities for bundle "AcmeBlogBundle"

                                                                [RuntimeException]                                               

Bundle "AcmeBlogBundle" does not contain any mapped entities.

doctrine:generate:entities [–path="…"] [–no-backup] name