A wee bit of a cleanup of the API

- Move some method over to defaulted methods
 - Use Objects rather than Preconditions

src/main/java/dan200/computercraft/api/filesystem/IMount.java

@@ -90,7 +90,7 @@ public interface IMount
      * @throws IOException If the file does not exist, or could not be opened.
      */
     @Nonnull
-    @SuppressWarnings("deprecation")
+    @SuppressWarnings( "deprecation" )
     default ReadableByteChannel openChannelForRead( @Nonnull String path ) throws IOException
     {
         return Channels.newChannel( openForRead( path ) );

src/main/java/dan200/computercraft/api/filesystem/IWritableMount.java

@@ -67,7 +67,7 @@ public interface IWritableMount extends IMount
      * @throws IOException If the file could not be opened for writing.
      */
     @Nonnull
-    @SuppressWarnings("deprecation")
+    @SuppressWarnings( "deprecation" )
     default WritableByteChannel openChannelForWrite( @Nonnull String path ) throws IOException
     {
         return Channels.newChannel( openForWrite( path ) );
@@ -94,7 +94,7 @@ public interface IWritableMount extends IMount
      * @throws IOException If the file could not be opened for writing.
      */
     @Nonnull
-    @SuppressWarnings("deprecation")
+    @SuppressWarnings( "deprecation" )
     default WritableByteChannel openChannelForAppend( @Nonnull String path ) throws IOException
     {
         return Channels.newChannel( openForAppend( path ) );

src/main/java/dan200/computercraft/api/filesystem/package-info.java

@@ -4,7 +4,7 @@
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
 
-@API( owner="ComputerCraft", provides="ComputerCraft|API|FileSystem", apiVersion="${version}" )
+@API( owner = "ComputerCraft", provides = "ComputerCraft|API|FileSystem", apiVersion = "${version}" )
 package dan200.computercraft.api.filesystem;
 
 import net.minecraftforge.fml.common.API;