diff --git a/build.gradle b/build.gradle
index 7383a5e..894132e 100755
--- a/build.gradle
+++ b/build.gradle
@@ -98,10 +98,17 @@ task nativeJar(type: Jar) {
     archiveName = 'native-platform-jni.jar'
 }
 
+javadoc {
+    exclude '**/internal/**'
+}
+
 startScripts.classpath += nativeJar.outputs.files
 applicationDistribution.from(nativeJar) {
     into 'lib'
 }
+applicationDistribution.from(javadoc) {
+    into 'javadoc'
+}
 
 libraries.all {
     it.spec.task.dependsOn nativeHeaders
diff --git a/src/main/java/net/rubygrapefruit/platform/FileSystem.java b/src/main/java/net/rubygrapefruit/platform/FileSystem.java
index be33096..3679c28 100644
--- a/src/main/java/net/rubygrapefruit/platform/FileSystem.java
+++ b/src/main/java/net/rubygrapefruit/platform/FileSystem.java
@@ -2,12 +2,27 @@ package net.rubygrapefruit.platform;
 
 import java.io.File;
 
+/**
+ * Information about a file system. This is a snapshot view and does not change.
+ */
 public interface FileSystem {
+    /**
+     * Returns the root directory of this file system.
+     */
     File getMountPoint();
 
+    /**
+     * Returns the operating system specific name for the type of this file system.
+     */
     String getFileSystemType();
 
+    /**
+     * Returns true if this file system is a remote file system, or false if local.
+     */
     boolean isRemote();
 
+    /**
+     * Returns the operating system specific name for this file system.
+     */
     String getDeviceName();
 }
diff --git a/src/main/java/net/rubygrapefruit/platform/FileSystems.java b/src/main/java/net/rubygrapefruit/platform/FileSystems.java
index 2d689d0..6411fc9 100644
--- a/src/main/java/net/rubygrapefruit/platform/FileSystems.java
+++ b/src/main/java/net/rubygrapefruit/platform/FileSystems.java
@@ -2,6 +2,9 @@ package net.rubygrapefruit.platform;
 
 import java.util.List;
 
+/**
+ * Provides access to the file systems of the current machine.
+ */
 public interface FileSystems extends NativeIntegration {
     /**
      * Returns the set of all file systems for the current machine.
diff --git a/src/main/java/net/rubygrapefruit/platform/Native.java b/src/main/java/net/rubygrapefruit/platform/Native.java
index d47e6b0..9d4a957 100755
--- a/src/main/java/net/rubygrapefruit/platform/Native.java
+++ b/src/main/java/net/rubygrapefruit/platform/Native.java
@@ -13,12 +13,16 @@ public class Native {
     private static final Object lock = new Object();
     private static boolean loaded;
 
+    private Native() {
+    }
+
     /**
      * Initialises the native integration, if not already initialized.
      *
-     * @param extractDir The directory to extract native resources into. May be null.
+     * @param extractDir The directory to extract native resources into. May be null, in which case a default is
+     * selected.
      */
-    static void init(File extractDir) {
+    static public void init(File extractDir) {
         synchronized (lock) {
             if (!loaded) {
                 Platform platform = Platform.current();
@@ -56,7 +60,13 @@ public class Native {
         }
     }
 
-    static <T extends NativeIntegration> T get(Class<T> type) {
+    /**
+     * Locates a native integration of the given type.
+     *
+     * @return The native integration.
+     * @throws UnsupportedOperationException if the given integration is not available.
+     */
+    public static <T extends NativeIntegration> T get(Class<T> type) throws UnsupportedOperationException {
         init(null);
         Platform platform = Platform.current();
         T integration = platform.get(type);
diff --git a/src/main/java/net/rubygrapefruit/platform/NativeIntegration.java b/src/main/java/net/rubygrapefruit/platform/NativeIntegration.java
index 1e98644..61e1d43 100644
--- a/src/main/java/net/rubygrapefruit/platform/NativeIntegration.java
+++ b/src/main/java/net/rubygrapefruit/platform/NativeIntegration.java
@@ -1,4 +1,7 @@
 package net.rubygrapefruit.platform;
 
+/**
+ * A marker interface that represents a native integration.
+ */
 public interface NativeIntegration {
 }
diff --git a/src/main/java/net/rubygrapefruit/platform/PosixFile.java b/src/main/java/net/rubygrapefruit/platform/PosixFile.java
index 88b8876..433d092 100644
--- a/src/main/java/net/rubygrapefruit/platform/PosixFile.java
+++ b/src/main/java/net/rubygrapefruit/platform/PosixFile.java
@@ -4,8 +4,6 @@ import java.io.File;
 
 /**
  * Functions to query and modify a file's POSIX meta-data.
- *
- * Supported on Linux, OS X
  */
 public interface PosixFile extends NativeIntegration {
     /**
diff --git a/src/main/java/net/rubygrapefruit/platform/SystemInfo.java b/src/main/java/net/rubygrapefruit/platform/SystemInfo.java
index 9a35f50..a16912c 100644
--- a/src/main/java/net/rubygrapefruit/platform/SystemInfo.java
+++ b/src/main/java/net/rubygrapefruit/platform/SystemInfo.java
@@ -1,27 +1,21 @@
 package net.rubygrapefruit.platform;
 
 /**
- * Provides access to some system information.
+ * Provides access to some system information. This is a snapshot view and does not change.
  */
 public interface SystemInfo extends NativeIntegration {
     /**
      * Returns the name of the kernel for the current operating system.
-     *
-     * @throws NativeException on failure.
      */
-    String getKernelName() throws NativeException;
+    String getKernelName();
 
     /**
      * Returns the version of the kernel for the current operating system.
-     *
-     * @throws NativeException on failure.
      */
-    String getKernelVersion() throws NativeException;
+    String getKernelVersion();
 
     /**
      * Returns the machine architecture, as reported by the operating system.
-     *
-     * @throws NativeException on failure.
      */
-    String getMachineArchitecture() throws NativeException;
+    String getMachineArchitecture();
 }
diff --git a/src/main/java/net/rubygrapefruit/platform/Terminal.java b/src/main/java/net/rubygrapefruit/platform/Terminal.java
index bc87614..d7230f0 100644
--- a/src/main/java/net/rubygrapefruit/platform/Terminal.java
+++ b/src/main/java/net/rubygrapefruit/platform/Terminal.java
@@ -6,6 +6,9 @@ package net.rubygrapefruit.platform;
  * Supported on Linux, OS X, Windows.
  */
 public interface Terminal {
+    /**
+     * Colors supported by a terminal.
+     */
     enum Color {
         Black, Red, Green, Yellow, Blue, Magenta, Cyan, White
     }
diff --git a/src/main/java/net/rubygrapefruit/platform/TerminalSize.java b/src/main/java/net/rubygrapefruit/platform/TerminalSize.java
index 99ce742..e9bb74f 100644
--- a/src/main/java/net/rubygrapefruit/platform/TerminalSize.java
+++ b/src/main/java/net/rubygrapefruit/platform/TerminalSize.java
@@ -1,7 +1,16 @@
 package net.rubygrapefruit.platform;
 
+/**
+ * The size of a terminal. This is a snapshot view and does not change.
+ */
 public interface TerminalSize {
+    /**
+     * Returns the number of character columns in the terminal.
+     */
     public int getCols();
 
+    /**
+     * Returns the number of character rows in the terminal.
+     */
     public int getRows();
 }
diff --git a/src/main/java/net/rubygrapefruit/platform/Terminals.java b/src/main/java/net/rubygrapefruit/platform/Terminals.java
index 76ea3c9..3c82711 100644
--- a/src/main/java/net/rubygrapefruit/platform/Terminals.java
+++ b/src/main/java/net/rubygrapefruit/platform/Terminals.java
@@ -6,6 +6,9 @@ package net.rubygrapefruit.platform;
  * Supported on Linux, OS X, Windows.
  */
 public interface Terminals extends NativeIntegration {
+    /**
+     * System outputs.
+     */
     enum Output {Stdout, Stderr}
 
     /**
diff --git a/src/main/java/net/rubygrapefruit/platform/package-info.java b/src/main/java/net/rubygrapefruit/platform/package-info.java
new file mode 100644
index 0000000..4ce0c7a
--- /dev/null
+++ b/src/main/java/net/rubygrapefruit/platform/package-info.java
@@ -0,0 +1,4 @@
+/**
+ * The native integrations. Use {@link net.rubygrapefruit.platform.Native#get(Class)} to access a native integration.
+ */
+package net.rubygrapefruit.platform;
\ No newline at end of file