docs: Add docs to new config classes

src/main/java/com/onarandombox/MultiverseCore/configuration/handle/ConfigurationSectionHandle.java

@@ -8,6 +8,9 @@ import org.jetbrains.annotations.Nullable;
 
 import java.util.logging.Logger;
 
+/**
+ * Configuration handle for a single configuration section.
+ */
 public class ConfigurationSectionHandle extends GenericConfigHandle<ConfigurationSection> {
     public static Builder<? extends Builder> builder(@NotNull ConfigurationSection configurationSection) {
         return new Builder<>(configurationSection);
@@ -21,6 +24,11 @@ public class ConfigurationSectionHandle extends GenericConfigHandle<Configuratio
         this.config = configurationSection;
     }
 
+    /**
+     * Builder for {@link ConfigurationSectionHandle}.
+     *
+     * @param <B>   The builder type.
+     */
     public static class Builder<B extends Builder<B>> extends GenericConfigHandle.Builder<ConfigurationSection, B> {
         private final ConfigurationSection configurationSection;
 
@@ -28,6 +36,9 @@ public class ConfigurationSectionHandle extends GenericConfigHandle<Configuratio
             this.configurationSection = configurationSection;
         }
 
+        /**
+         * {@inheritDoc}
+         */
         @Override
         public @NotNull ConfigurationSectionHandle build() {
             return new ConfigurationSectionHandle(configurationSection, logger, nodes, migrator);

src/main/java/com/onarandombox/MultiverseCore/configuration/handle/FileConfigHandle.java

@@ -99,7 +99,7 @@ abstract class FileConfigHandle<C extends FileConfiguration> extends GenericConf
     }
 
     /**
-     * Builder for {@link FileConfigHandle}.
+     * Abstract builder for {@link FileConfigHandle}.
      *
      * @param <C>   The configuration type.
      * @param <B>   The builder type.

src/main/java/com/onarandombox/MultiverseCore/configuration/handle/GenericConfigHandle.java

@@ -12,6 +12,9 @@ import org.jetbrains.annotations.Nullable;
 
 import java.util.logging.Logger;
 
+/**
+ * Generic configuration handle for all ConfigurationSection types.
+ */
 public abstract class GenericConfigHandle<C extends ConfigurationSection> {
     protected final @Nullable Logger logger;
     protected final @Nullable NodeGroup nodes;
@@ -121,7 +124,7 @@ public abstract class GenericConfigHandle<C extends ConfigurationSection> {
     }
 
     /**
-     * Builder for {@link FileConfigHandle}.
+     * Abstract builder for {@link GenericConfigHandle}.
      *
      * @param <C>   The configuration type.
      * @param <B>   The builder type.