Versioning for jenkins builds

pom.xml

@@ -4,7 +4,7 @@
     <groupId>me.clip</groupId>
     <artifactId>placeholderapi</artifactId>
 
-    <version>2.8.5</version>
+    <version>2.8.5-Dev-${BUILD_NUMBER}</version>
     <name>PlaceholderAPI</name>
     <description>An awesome placeholder provider!</description>
     <url>http://extendedclip.com</url>
@@ -41,7 +41,16 @@
 
     <build>
         <defaultGoal>clean package</defaultGoal>
+
         <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>2.3.2</version>
+                <configuration>
+                    <finalName>${project.name}-${project.version}</finalName>
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>