diff --git a/pgpainless-core/src/main/java/org/pgpainless/provider/BouncyCastleProviderFactory.java b/pgpainless-core/src/main/java/org/pgpainless/provider/BouncyCastleProviderFactory.java
index ace5edbe..7169238a 100644
--- a/pgpainless-core/src/main/java/org/pgpainless/provider/BouncyCastleProviderFactory.java
+++ b/pgpainless-core/src/main/java/org/pgpainless/provider/BouncyCastleProviderFactory.java
@@ -8,6 +8,9 @@ import java.security.Provider;
 
 import org.bouncycastle.jce.provider.BouncyCastleProvider;
 
+/**
+ * Implementation of {@link ProviderFactory} using a {@link BouncyCastleProvider}.
+ */
 public final class BouncyCastleProviderFactory extends ProviderFactory {
 
     private static final Provider provider = new BouncyCastleProvider();
diff --git a/pgpainless-core/src/main/java/org/pgpainless/provider/ProviderFactory.java b/pgpainless-core/src/main/java/org/pgpainless/provider/ProviderFactory.java
index 4af67c60..5942b0d5 100644
--- a/pgpainless-core/src/main/java/org/pgpainless/provider/ProviderFactory.java
+++ b/pgpainless-core/src/main/java/org/pgpainless/provider/ProviderFactory.java
@@ -6,6 +6,14 @@ package org.pgpainless.provider;
 
 import java.security.Provider;
 
+/**
+ * Allow the use of different {@link Provider} implementations to provide cryptographic primitives by setting
+ * a {@link ProviderFactory} singleton.
+ * By default, the class is initialized with a {@link BouncyCastleProviderFactory}.
+ * <br>
+ * To make use of your own custom {@link Provider}, call {@link #setFactory(ProviderFactory)}, passing your
+ * own custom {@link ProviderFactory} instance.
+ */
 public abstract class ProviderFactory {
 
     private static ProviderFactory FACTORY;