Fixes #170

Author: Bart-0110

src/main/java/net/licks92/WirelessRedstone/Listeners/BlockListener.java

@@ -34,7 +34,7 @@ public void onSignChange(final SignChangeEvent event) {
                 return;
             }
 
-            if (event.getLine(1).equalsIgnoreCase("")){
+            if (event.getLine(1).equalsIgnoreCase("")) {
                 event.getBlock().setType(Material.AIR);
                 event.getBlock().getWorld().dropItem(event.getBlock().getLocation(), new ItemStack(Material.SIGN));
                 Utils.sendFeedback("No channelname given!", event.getPlayer(), true); //TODO: Add string to stringloader
@@ -280,7 +280,7 @@ public void onBlockRedstoneChange(BlockRedstoneEvent event) {
         if (event.getOldCurrent() == event.getNewCurrent())
             return;
 
-        if(event.getBlock().getState() instanceof Sign){
+        if (event.getBlock().getState() instanceof Sign) {
             Sign signObject = (Sign) event.getBlock().getState();
 
             if (Main.getSignManager().getSignType(signObject.getLine(0)) != SignType.TRANSMITTER)
@@ -310,7 +310,7 @@ public void onBlockRedstoneChange(BlockRedstoneEvent event) {
         }
 
         BlockRedstoneEvent e = null;
-        switch (event.getBlock().getType()){
+        switch (event.getBlock().getType()) {
             case LEVER:
             case STONE_BUTTON:
             case WOOD_BUTTON:
@@ -334,7 +334,7 @@ public void onBlockRedstoneChange(BlockRedstoneEvent event) {
                 break;
         }
 
-        for (BlockFace blockFace : Utils.getEveryBlockFace(true)){
+        for (BlockFace blockFace : Utils.getEveryBlockFace(true)) {
             if (event.getBlock().getRelative(blockFace).getState() instanceof Sign) {
                 Sign signObject = (Sign) event.getBlock().getRelative(blockFace).getState();
 

src/main/java/net/licks92/WirelessRedstone/Storage/SQLiteStorage.java

@@ -430,7 +430,7 @@ public boolean convertFromAnotherStorage(StorageType type) {
 
     @Override
     public boolean isChannelEmpty(WirelessChannel channel) {
-        return (channel.getReceivers().size() < 1) && (channel.getTransmitters().size() < 1) && (channel.getScreens().size() < 1);
+        return channel == null || (channel.getReceivers().size() < 1) && (channel.getTransmitters().size() < 1) && (channel.getScreens().size() < 1);
     }
 
     @Override

src/main/java/net/licks92/WirelessRedstone/Storage/YamlStorage.java

@@ -364,9 +364,7 @@ public boolean convertFromAnotherStorage(StorageType type) { //TODO: Finish this
 
     @Override
     public boolean isChannelEmpty(WirelessChannel channel) {
-        return (channel.getReceivers().size() < 1)
-                && (channel.getTransmitters().size() < 1)
-                && (channel.getScreens().size() < 1);
+        return channel == null || (channel.getReceivers().size() < 1) && (channel.getTransmitters().size() < 1) && (channel.getScreens().size() < 1);
     }
 
     @Override