Fixed some doc problems

src/pocketmine/plugin/PharPluginLoader.php

@@ -47,7 +47,7 @@ class PharPluginLoader implements PluginLoader{
 	 *
 	 * @param string $file
 	 *
-	 * @return Plugin
+	 * @return Plugin|null
 	 *
 	 * @throws \Exception
 	 */
@@ -80,7 +80,7 @@ class PharPluginLoader implements PluginLoader{
 	 *
 	 * @param string $file
 	 *
-	 * @return PluginDescription
+	 * @return PluginDescription|null
 	 */
 	public function getPluginDescription($file){
 		$phar = new \Phar($file);

src/pocketmine/plugin/Plugin.php

@@ -45,6 +45,9 @@ interface Plugin extends CommandExecutor{
 	 */
 	public function onEnable();
 
+	/**
+	 * @return bool
+	 */
 	public function isEnabled();
 
 	/**

src/pocketmine/plugin/PluginBase.php

@@ -137,7 +137,7 @@ abstract class PluginBase implements Plugin{
 	/**
 	 * @param string $name
 	 *
-	 * @return Command|PluginIdentifiableCommand
+	 * @return Command|PluginIdentifiableCommand|null
 	 */
 	public function getCommand($name){
 		$command = $this->getServer()->getPluginCommand($name);
@@ -177,7 +177,7 @@ abstract class PluginBase implements Plugin{
 	 *
 	 * @param string $filename
 	 *
-	 * @return resource Resource data, or null
+	 * @return resource|null Resource data, or null
 	 */
 	public function getResource($filename){
 		$filename = rtrim(str_replace("\\", "/", $filename), "/");

src/pocketmine/plugin/ScriptPluginLoader.php

@@ -48,7 +48,7 @@ class ScriptPluginLoader implements PluginLoader{
 	 *
 	 * @param string $file
 	 *
-	 * @return Plugin
+	 * @return Plugin|null
 	 *
 	 * @throws \Exception
 	 */
@@ -82,7 +82,7 @@ class ScriptPluginLoader implements PluginLoader{
 	 *
 	 * @param string $file
 	 *
-	 * @return PluginDescription
+	 * @return PluginDescription|null
 	 */
 	public function getPluginDescription($file){
 		$content = file($file, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);