What am I doing wrong?

Here is my code:

pom.xml

Code:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.cactuscombo.npc</groupId>
    <artifactId>lib</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <profiles>
        <profile>
            <id>com.cactuscombo.npc</id>
            <build>
                <finalName>NPC</finalName>
                <directory>src/main/java/</directory>
                <resources>
                    <resource>
                        <targetPath>.</targetPath>
                        <filtering>true</filtering>
                        <directory>${basedir}/src/main/resources/</directory>
                        <includes>
                            <include>plugin.yml</include>
                            <include>config.yml</include>
                        </includes>
                    </resource>
                </resources>
                <plugins>
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-compiler-plugin</artifactId>
                        <configuration>
                            <source>1.7</source>
                            <target>1.7</target>
                        </configuration>
                    </plugin>
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-shade-plugin</artifactId>
                        <version>2.3</version>
                        <executions>
                            <execution>
                                <phase>package</phase>
                                <goals>
                                    <goal>shade</goal>
                                </goals>
                                <configuration>
                                    <artifactSet>
                                        <includes>
                                            <include>net.techable.npclib:NPCLib</include>
                                        </includes>
                                    </artifactSet>
                                    <relocations>
                                        <relocation>
                                            <pattern>net.techcable.npclib</pattern>
                                            <shadedPattern>com.cactuscombo.npc.lib.libs.npclib</shadedPattern>
                                        </relocation>
                                    </relocations>
                                </configuration>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>
        </profile>
    </profiles>
    <repositories>
        <repository>
            <id>spigot-repo</id>
            <url>https://hub.spigotmc.org/nexus/content/groups/public/</url>
        </repository>
        <repository>
            <id>techcable-repo</id>
            <url>http://repo.techcable.net/content/groups/public/</url>
        </repository>
    </repositories>

    <dependencies>
        <dependency>
            <groupId>org.spigotmc</groupId>
            <artifactId>spigot-api</artifactId>
            <version>1.8-R0.1-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>net.techcable</groupId>
            <artifactId>npclib</artifactId>
            <version>1.1.1-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>

</project>

Main Class:

Code:

package com.cactuscombo.npc;

import net.techcable.npclib.NPC;
import net.techcable.npclib.NPCLib;
import net.techcable.npclib.NPCRegistry;

import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.EntityType;
import org.bukkit.entity.Player;
import org.bukkit.plugin.java.JavaPlugin;

public class Main extends JavaPlugin{
   
    public void onEnable() {
       
    }
   
    public boolean onCommand(CommandSender sender, Command cmd, String str, String[] args) {
        Player p = (Player)sender;
        if(cmd.getName().equalsIgnoreCase("npc")) {
            NPCRegistry registry = NPCLib. getNPCRegistry("TacoRegistry", this);
            NPC npc = registry. createNPC(EntityType.PLAYER, "TacoMan");
            npc.setProtected(true);
            npc.spawn(p.getLocation());
        }
        return true;
    }

}

but everytime i do the command, it gives me the following error:

Code:

[17:52:53 INFO]: MineplexMOD issued server command: /npc
[17:52:53 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'npc'
in plugin NPC v1.0
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spi
got.jar:git-Spigot-4c2b59a]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:18
1) ~[spigot.jar:git-Spigot-4c2b59a]
        at org.bukkit.craftbukkit.v1_8_R1.CraftServer.dispatchCommand(CraftServe
r.java:643) ~[spigot.jar:git-Spigot-4c2b59a]
        at net.minecraft.server.v1_8_R1.PlayerConnection.handleCommand(PlayerCon
nection.java:1083) [spigot.jar:git-Spigot-4c2b59a]
        at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java
:918) [spigot.jar:git-Spigot-4c2b59a]
        at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java
:26) [spigot.jar:git-Spigot-4c2b59a]
        at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java
:53) [spigot.jar:git-Spigot-4c2b59a]
        at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [spi
got.jar:git-Spigot-4c2b59a]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [
?:1.8.0_25]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_25]
        at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:6
84) [spigot.jar:git-Spigot-4c2b59a]
        at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:3
16) [spigot.jar:git-Spigot-4c2b59a]
        at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:6
25) [spigot.jar:git-Spigot-4c2b59a]
        at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java
:528) [spigot.jar:git-Spigot-4c2b59a]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_25]
Caused by: java.lang.NoClassDefFoundError: net/techcable/npclib/NPCLib
        at com.cactuscombo.npc.Main.onCommand(Main.java:22) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spi
got.jar:git-Spigot-4c2b59a]
        ... 14 more
Caused by: java.lang.ClassNotFoundException: net.techcable.npclib.NPCLib
        at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.8.0_25]
        at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.8.0_25]
        at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_
25]
        at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_25]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.
java:101) ~[spigot.jar:git-Spigot-4c2b59a]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.
java:86) ~[spigot.jar:git-Spigot-4c2b59a]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_25]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_25]
        at com.cactuscombo.npc.Main.onCommand(Main.java:22) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spi
got.jar:git-Spigot-4c2b59a]
        ... 14 more
>

 

Their is something going wrong on line 22 of your main class.
Read the stackTrace(at com.cactuscombo.npc.Main.onCommand(Main.java:22) ~[?:?])

 

@hopstar
The line is NPCRegistry registry = NPCLib. getNPCRegistry("TacoRegistry", this);

but the stack trace says NoClassFound NPE, I want to know what i did wrong in my pom.xml