code/Debug/Model/RequestInfo.php
public function initLogging()
    {
        $helper = Mage::helper('sheep_debug');
        $this->logging = Mage::getModel('sheep_debug/logging');

        $this->logging->addFile($helper->getLogFilename($this->getStoreId()));
        $this->logging->addFile($helper->getExceptionLogFilename($this->getStoreId()));

        Mage::dispatchEvent('sheep_debug_init_logging', array('logging' => $this->logging));

        $this->logging->startRequest();
    }
public function initLogging()
    {
        $helper = Mage::helper('sheep_debug');
        $this->logging = Mage::getModel('sheep_debug/logging');

        $this->logging->addFile($helper->getLogFilename($this->getStoreId()));
        $this->logging->addFile($helper->getExceptionLogFilename($this->getStoreId()));

        Mage::dispatchEvent('sheep_debug_init_logging', array('logging' => $this->logging));

        $this->logging->startRequest();
    }
Initialises logging by registering commong log files