NPE when installing jar file with FTP

(by bertek41 from VolmitSoftware#4)

pom.xml

@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>com.volmit</groupId>
 	<artifactId>BileTools</artifactId>
-	<version>2</version>
+	<version>2.1</version>
 	<name>BileTools</name>
 	<properties>
 		<maven.compiler.source>1.8</maven.compiler.source>
@@ -36,7 +36,7 @@
 				<version>2.3.1</version>
 				<configuration>
 					<finalName>${project.name}</finalName>
-					<outputDirectory>C:\Users\cyberpwn\Documents\development\servers\dynamic\plugins</outputDirectory>
+					<!--outputDirectory>C:\Users\cyberpwn\Documents\development\servers\dynamic\plugins</outputDirectory-->
 				</configuration>
 			</plugin>
 		</plugins>

src/main/java/com/volmit/bile/BileTools.java

@@ -454,7 +454,8 @@ public void run()
 
 					for(Plugin j : Bukkit.getServer().getPluginManager().getPlugins())
 					{
-						if(BileUtils.getPluginFile(j).getName().equals(i.getName()))
+						File file = BileUtils.getPluginFile(j);
+						if(file != null && file.getName().equals(i.getName()))
 						{
 							getLogger().log(Level.INFO, "File change detected: " + i.getName());
 							getLogger().log(Level.INFO, "Identified Plugin: " + j.getName() + " <-> " + i.getName());

src/main/java/com/volmit/volume/cluster/ClusterStringList.java

@@ -7,6 +7,6 @@ public class ClusterStringList extends ClusterBase<GList<String>>
 	@SuppressWarnings("unchecked")
 	public ClusterStringList(GList<String> t)
 	{
-		super((Class<? extends GList<String>>) GList.class, t);
+		super((Class<? extends GList<String>>) (Class<? extends GList>) GList.class, t);
 	}
 }

src/main/resources/plugin.yml

@@ -1,6 +1,7 @@
 name: ${project.name}
 version: ${project.version}
 main: com.volmit.bile.BileTools
+api-version: 1.13
 commands: 
   biletools:
     aliases: [bile, bi, b, volmit, vomit, vom]