updated some annotations

eco-api/src/main/java/com/willfp/eco/core/command/CommandBase.java

@@ -24,14 +24,14 @@ public interface CommandBase {
      *
      * @return The name.
      */
-    String getName();
+    @NotNull String getName();
 
     /**
      * Get command permission.
      *
      * @return The permission.
      */
-    String getPermission();
+    @Nullable String getPermission();
 
     /**
      * If only players can execute the command.

eco-api/src/main/java/com/willfp/eco/core/command/impl/PluginCommand.java

@@ -41,7 +41,7 @@ public abstract class PluginCommand implements PluginCommandBase {
     }
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return delegate.getName();
     }
 
@@ -56,7 +56,7 @@ public abstract class PluginCommand implements PluginCommandBase {
     }
 
     @Override
-    public CommandBase addSubcommand(@NotNull CommandBase command) {
+    public @NotNull CommandBase addSubcommand(@NotNull CommandBase command) {
         return delegate.addSubcommand(command);
     }
 

eco-api/src/main/java/com/willfp/eco/core/command/impl/Subcommand.java

@@ -43,7 +43,7 @@ public abstract class Subcommand implements CommandBase {
     }
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return delegate.getName();
     }
 
@@ -58,7 +58,7 @@ public abstract class Subcommand implements CommandBase {
     }
 
     @Override
-    public CommandBase addSubcommand(@NotNull CommandBase command) {
+    public @NotNull CommandBase addSubcommand(@NotNull CommandBase command) {
         return delegate.addSubcommand(command);
     }