Formatting

demo/plugins/plugin1/pom.xml

@@ -18,7 +18,7 @@
         <plugin.class>org.pf4j.demo.welcome.WelcomePlugin</plugin.class>
         <plugin.version>0.0.1</plugin.version>
         <plugin.provider>Decebal Suiu</plugin.provider>
-        <plugin.dependencies />
+        <plugin.dependencies/>
     </properties>
 
     <dependencies>

demo/plugins/plugin2/pom.xml

@@ -18,7 +18,7 @@
         <plugin.class>org.pf4j.demo.hello.HelloPlugin</plugin.class>
         <plugin.version>0.0.1</plugin.version>
         <plugin.provider>Decebal Suiu</plugin.provider>
-        <plugin.dependencies />
+        <plugin.dependencies/>
     </properties>
 
 </project>

demo/plugins/pom.xml

@@ -17,11 +17,13 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>1.7</java.version>
-        <plugin.id />
-        <plugin.class />
-        <plugin.version />
-        <plugin.provider />
-        <plugin.dependencies />
+
+        <!-- Override below properties in each plugin's pom.xml -->
+        <plugin.id/>
+        <plugin.class/>
+        <plugin.version/>
+        <plugin.provider/>
+        <plugin.dependencies/>
     </properties>
 
     <build>

pf4j/src/main/java/org/pf4j/AbstractPluginManager.java

@@ -525,27 +525,29 @@ public abstract class AbstractPluginManager implements PluginManager {
         return pluginClassLoaders.get(pluginId);
     }
 
+    @SuppressWarnings("unchecked")
     @Override
     public <T> List<Class<T>> getExtensionClasses(Class<T> type) {
         List<ExtensionWrapper<T>> extensionsWrapper = extensionFinder.find(type);
         List<Class<T>> extensionClasses = new ArrayList<>(extensionsWrapper.size());
         for (ExtensionWrapper<T> extensionWrapper : extensionsWrapper) {
-            @SuppressWarnings("unchecked")
-            Class<T> c = (Class<T>)extensionWrapper.getDescriptor().extensionClass;
+            Class<T> c = (Class<T>) extensionWrapper.getDescriptor().extensionClass;
             extensionClasses.add(c);
         }
+
         return extensionClasses;
     }
 
+    @SuppressWarnings("unchecked")
     @Override
     public <T> List<Class<T>> getExtensionClasses(Class<T> type, String pluginId) {
         List<ExtensionWrapper<T>> extensionsWrapper = extensionFinder.find(type, pluginId);
         List<Class<T>> extensionClasses = new ArrayList<>(extensionsWrapper.size());
         for (ExtensionWrapper<T> extensionWrapper : extensionsWrapper) {
-            @SuppressWarnings("unchecked")
-            Class<T> c = (Class<T>)extensionWrapper.getDescriptor().extensionClass;
+            Class<T> c = (Class<T>) extensionWrapper.getDescriptor().extensionClass;
             extensionClasses.add(c);
         }
+
         return extensionClasses;
     }