diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/HttpCharset.java b/akka-http-core/src/main/java/akka/http/javadsl/model/HttpCharset.java
index 69fc4d39ff..500fea2c68 100644
--- a/akka-http-core/src/main/java/akka/http/javadsl/model/HttpCharset.java
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/HttpCharset.java
@@ -9,6 +9,8 @@ import java.nio.charset.Charset;
 /**
  * Represents a charset in Http. See {@link HttpCharsets} for a set of predefined charsets and
  * static constructors to create custom charsets.
+ *
+ * @see HttpCharsets for convenience access to often used values.
  */
 public abstract class HttpCharset {
     /**
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/HttpCharsetRange.java b/akka-http-core/src/main/java/akka/http/javadsl/model/HttpCharsetRange.java
index 26c8d57f63..c21713bc12 100644
--- a/akka-http-core/src/main/java/akka/http/javadsl/model/HttpCharsetRange.java
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/HttpCharsetRange.java
@@ -7,6 +7,8 @@ package akka.http.javadsl.model;
 /**
  * Represents an Http charset range. This can either be `*` which matches all charsets or a specific
  * charset. {@link HttpCharsetRanges} contains static constructors for HttpCharsetRanges.
+ *
+ * @see HttpCharsetRanges for convenience access to often used values.
  */
 public abstract class HttpCharsetRange {
 
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/HttpEntities.java b/akka-http-core/src/main/java/akka/http/javadsl/model/HttpEntities.java
index 0a78a0ddab..37b3f42abe 100644
--- a/akka-http-core/src/main/java/akka/http/javadsl/model/HttpEntities.java
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/HttpEntities.java
@@ -16,6 +16,8 @@ import akka.stream.javadsl.Source;
 public final class HttpEntities {
     private HttpEntities() {}
 
+    public static final HttpEntity.Strict EMPTY = HttpEntity$.MODULE$.Empty();
+
     public static HttpEntity.Strict create(String string) {
         return HttpEntity$.MODULE$.apply(string);
     }
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/HttpEntity.java b/akka-http-core/src/main/java/akka/http/javadsl/model/HttpEntity.java
index 265d4216d6..b58068c86b 100644
--- a/akka-http-core/src/main/java/akka/http/javadsl/model/HttpEntity.java
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/HttpEntity.java
@@ -5,6 +5,7 @@
 package akka.http.javadsl.model;
 
 import akka.http.impl.util.Util;
+import akka.http.javadsl.model.headers.EntityTagRanges;
 import akka.http.scaladsl.model.HttpEntity$;
 import akka.stream.Materializer;
 import akka.stream.javadsl.Source;
@@ -37,6 +38,8 @@ import java.util.concurrent.CompletionStage;
  *  - UniversalEntity: an entity type that can be used in every context
  *
  * Use the static constructors in HttpEntities to construct instances.
+ *
+ * @see HttpEntities for javadsl convenience methods.
  */
 public interface HttpEntity {
     /**
@@ -46,8 +49,12 @@ public interface HttpEntity {
 
     /**
      * The empty entity.
+     *
+     * @deprecated Will be removed in Akka 3.x, use {@link HttpEntities#EMPTY} instead.
      */
-    HttpEntity.Strict EMPTY = HttpEntity$.MODULE$.Empty();
+    @Deprecated
+    // FIXME: Remove in Akka 3.0
+    HttpEntity.Strict EMPTY = HttpEntities.EMPTY;
 
     /**
      * Returns if this entity is known to be empty. Open-ended entity types like
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/HttpMethod.java b/akka-http-core/src/main/java/akka/http/javadsl/model/HttpMethod.java
index f78b5c8bdc..f554bd438e 100644
--- a/akka-http-core/src/main/java/akka/http/javadsl/model/HttpMethod.java
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/HttpMethod.java
@@ -7,6 +7,8 @@ package akka.http.javadsl.model;
 /**
  * Represents an HTTP request method. See {@link HttpMethods} for a set of predefined methods
  * and static constructors to create custom ones.
+ *
+ * @see HttpMethods for convenience access to often used values.
  */
 public abstract class HttpMethod {
 
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/HttpProtocol.java b/akka-http-core/src/main/java/akka/http/javadsl/model/HttpProtocol.java
index a65a2badfd..cc69fa4ba1 100644
--- a/akka-http-core/src/main/java/akka/http/javadsl/model/HttpProtocol.java
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/HttpProtocol.java
@@ -7,6 +7,8 @@ package akka.http.javadsl.model;
 /**
  * Represents an Http protocol (currently only HTTP/1.0 or HTTP/1.1). See {@link HttpProtocols}
  * for the predefined constants for the supported protocols.
+ *
+ * @see HttpProtocols for convenience access to often used values.
  */
 public abstract class HttpProtocol {
     /**
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/MediaTypes.java b/akka-http-core/src/main/java/akka/http/javadsl/model/MediaTypes.java
index 5e1e1e2882..f5fffa3dab 100644
--- a/akka-http-core/src/main/java/akka/http/javadsl/model/MediaTypes.java
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/MediaTypes.java
@@ -12,7 +12,7 @@ import java.util.Optional;
 /**
  * Contains the set of predefined media-types.
  */
-public abstract class MediaTypes {
+public final class MediaTypes {
     public static final MediaType.WithOpenCharset APPLICATION_ATOM_XML = akka.http.scaladsl.model.MediaTypes.application$divatom$plusxml();
     public static final MediaType.WithOpenCharset APPLICATION_BASE64 = akka.http.scaladsl.model.MediaTypes.application$divbase64();
     public static final MediaType.Binary APPLICATION_EXCEL = akka.http.scaladsl.model.MediaTypes.application$divexcel();
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/RemoteAddress.java b/akka-http-core/src/main/java/akka/http/javadsl/model/RemoteAddress.java
index b40160ce92..bf4754a622 100644
--- a/akka-http-core/src/main/java/akka/http/javadsl/model/RemoteAddress.java
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/RemoteAddress.java
@@ -7,6 +7,8 @@ package akka.http.javadsl.model;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.util.Optional;
+
+import akka.http.javadsl.model.headers.HttpEncodingRanges;
 import scala.compat.java8.OptionConverters;
 
 public abstract class RemoteAddress {
@@ -19,7 +21,6 @@ public abstract class RemoteAddress {
      */
     public abstract int getPort();
 
-    public static final RemoteAddress UNKNOWN = akka.http.scaladsl.model.RemoteAddress.Unknown$.MODULE$;
     public static RemoteAddress create(InetAddress address) {
         return akka.http.scaladsl.model.RemoteAddress.apply(address, OptionConverters.toScala(Optional.empty()));
     }
@@ -29,4 +30,13 @@ public abstract class RemoteAddress {
     public static RemoteAddress create(byte[] address) {
         return akka.http.scaladsl.model.RemoteAddress.apply(address);
     }
+
+    /**
+     * @deprecated because of troublesome initialisation order (with regards to scaladsl class implementing this class).
+     *             In some edge cases this field could end up containing a null value.
+     *             Will be removed in Akka 3.x, use {@link HttpEncodingRanges#ALL} instead.
+     */
+    @Deprecated
+    // FIXME: Remove in Akka 3.0
+    public static final RemoteAddress UNKNOWN = RemoteAddresses.UNKNOWN;
 }
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/RemoteAddresses.java b/akka-http-core/src/main/java/akka/http/javadsl/model/RemoteAddresses.java
new file mode 100644
index 0000000000..2cd57ee135
--- /dev/null
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/RemoteAddresses.java
@@ -0,0 +1,10 @@
+/*
+ * Copyright (C) 2009-2016 Lightbend Inc. <http://www.lightbend.com>
+ */
+
+package akka.http.javadsl.model;
+
+public abstract class RemoteAddresses {
+
+    public static final RemoteAddress UNKNOWN = akka.http.scaladsl.model.RemoteAddress.Unknown$.MODULE$;
+}
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/StatusCode.java b/akka-http-core/src/main/java/akka/http/javadsl/model/StatusCode.java
index 0c307e9c5e..3e5eacc8d3 100644
--- a/akka-http-core/src/main/java/akka/http/javadsl/model/StatusCode.java
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/StatusCode.java
@@ -7,6 +7,8 @@ package akka.http.javadsl.model;
 /**
  * Represents an Http status-code and message. See {@link StatusCodes} for the set of predefined
  * status-codes.
+ *
+ * @see StatusCodes for convenience access to often used values.
  */
 public abstract class StatusCode {
     /**
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/TransferEncoding.java b/akka-http-core/src/main/java/akka/http/javadsl/model/TransferEncoding.java
index 341dac294b..2c344d04ab 100644
--- a/akka-http-core/src/main/java/akka/http/javadsl/model/TransferEncoding.java
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/TransferEncoding.java
@@ -5,9 +5,13 @@
 package akka.http.javadsl.model;
 
 import akka.http.impl.util.Util;
+import akka.http.javadsl.model.headers.EntityTagRanges;
 
 import java.util.Map;
 
+/**
+ * @see TransferEncodings for convenience access to often used values.
+ */
 public abstract class TransferEncoding {
     public abstract String name();
 
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/headers/CacheDirective.java b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/CacheDirective.java
index 2a1694ae6a..afeb68852d 100644
--- a/akka-http-core/src/main/java/akka/http/javadsl/model/headers/CacheDirective.java
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/CacheDirective.java
@@ -4,6 +4,7 @@
 
 package akka.http.javadsl.model.headers;
 
+/** @see CacheDirectives for convenience access to often used values. */
 public interface CacheDirective {
     String value();
 }
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/headers/ContentDispositionType.java b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/ContentDispositionType.java
index cab8a7aa8e..daf8c63841 100644
--- a/akka-http-core/src/main/java/akka/http/javadsl/model/headers/ContentDispositionType.java
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/ContentDispositionType.java
@@ -4,6 +4,9 @@
 
 package akka.http.javadsl.model.headers;
 
+/**
+ * @see ContentDispositionTypes for convenience access to often used values.
+ */
 public interface ContentDispositionType {
     String name();
 }
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/headers/EntityTagRange.java b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/EntityTagRange.java
index bb2863e08c..6e2dfb1822 100644
--- a/akka-http-core/src/main/java/akka/http/javadsl/model/headers/EntityTagRange.java
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/EntityTagRange.java
@@ -6,9 +6,20 @@ package akka.http.javadsl.model.headers;
 
 import akka.http.impl.util.Util;
 
+/**
+ * @see EntityTagRanges for convenience access to often used values.
+ */
 public abstract class EntityTagRange {
     public static EntityTagRange create(EntityTag... tags) {
         return akka.http.scaladsl.model.headers.EntityTagRange.apply(Util.<EntityTag, akka.http.scaladsl.model.headers.EntityTag>convertArray(tags));
     }
+
+    /**
+     * @deprecated because of troublesome initialisation order (with regards to scaladsl class implementing this class).
+     *             In some edge cases this field could end up containing a null value.
+     *             Will be removed in Akka 3.x, use {@link EntityTagRanges#ALL} instead.
+     */
+    @Deprecated
+    // FIXME: Remove in Akka 3.0
     public static final EntityTagRange ALL = akka.http.scaladsl.model.headers.EntityTagRange.$times$.MODULE$;
 }
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/headers/EntityTagRanges.java b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/EntityTagRanges.java
new file mode 100644
index 0000000000..642b0f7cec
--- /dev/null
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/EntityTagRanges.java
@@ -0,0 +1,11 @@
+/*
+ * Copyright (C) 2009-2016 Lightbend Inc. <http://www.lightbend.com>
+ */
+
+package akka.http.javadsl.model.headers;
+
+public final class EntityTagRanges {
+    private EntityTagRanges() { }
+
+    public static final EntityTagRange ALL = akka.http.scaladsl.model.headers.EntityTagRange.$times$.MODULE$;
+}
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/headers/HttpEncodingRange.java b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/HttpEncodingRange.java
index 1ea2e01ee2..92f3d11490 100644
--- a/akka-http-core/src/main/java/akka/http/javadsl/model/headers/HttpEncodingRange.java
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/HttpEncodingRange.java
@@ -6,14 +6,25 @@ package akka.http.javadsl.model.headers;
 
 import akka.http.scaladsl.model.headers.HttpEncodingRange$;
 
+/**
+ * @see HttpEncodingRanges for convenience access to often used values.
+ */
 public abstract class HttpEncodingRange {
     public abstract float qValue();
     public abstract boolean matches(HttpEncoding encoding);
 
     public abstract HttpEncodingRange withQValue(float qValue);
 
-    public static final HttpEncodingRange ALL = akka.http.scaladsl.model.headers.HttpEncodingRange.$times$.MODULE$;
     public static HttpEncodingRange create(HttpEncoding encoding) {
         return HttpEncodingRange$.MODULE$.apply((akka.http.scaladsl.model.headers.HttpEncoding) encoding);
     }
+
+    /**
+     * @deprecated because of troublesome initialisation order (with regards to scaladsl class implementing this class).
+     *             In some edge cases this field could end up containing a null value.
+     *             Will be removed in Akka 3.x, use {@link HttpEncodingRanges#ALL} instead.
+     */
+    @Deprecated
+    // FIXME: Remove in Akka 3.0
+    public static final HttpEncodingRange ALL = akka.http.scaladsl.model.headers.HttpEncodingRange.$times$.MODULE$;
 }
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/headers/HttpEncodingRanges.java b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/HttpEncodingRanges.java
new file mode 100644
index 0000000000..300677cda4
--- /dev/null
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/HttpEncodingRanges.java
@@ -0,0 +1,11 @@
+/*
+ * Copyright (C) 2009-2016 Lightbend Inc. <http://www.lightbend.com>
+ */
+
+package akka.http.javadsl.model.headers;
+
+public final class HttpEncodingRanges {
+    private HttpEncodingRanges() { }
+
+    public static final HttpEncodingRange ALL = akka.http.scaladsl.model.headers.HttpEncodingRange.$times$.MODULE$;
+}
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/headers/HttpOriginRange.java b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/HttpOriginRange.java
index 0c5d36dfa4..e51fbdff35 100644
--- a/akka-http-core/src/main/java/akka/http/javadsl/model/headers/HttpOriginRange.java
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/HttpOriginRange.java
@@ -7,11 +7,22 @@ package akka.http.javadsl.model.headers;
 import akka.http.scaladsl.model.headers.HttpOriginRange$;
 import akka.http.impl.util.Util;
 
+/**
+ * @see HttpOriginRanges for convenience access to often used values.
+ */
 public abstract class HttpOriginRange {
     public abstract boolean matches(HttpOrigin origin);
 
-    public static final HttpOriginRange ALL = akka.http.scaladsl.model.headers.HttpOriginRange.$times$.MODULE$;
     public static HttpOriginRange create(HttpOrigin... origins) {
         return HttpOriginRange$.MODULE$.apply(Util.<HttpOrigin, akka.http.scaladsl.model.headers.HttpOrigin>convertArray(origins));
     }
+
+    /**
+     * @deprecated because of troublesome initialisation order (with regards to scaladsl class implementing this class).
+     *             In some edge cases this field could end up containing a null value.
+     *             Will be removed in Akka 3.x, use {@link HttpEncodingRanges#ALL} instead.
+     */
+    @Deprecated
+    // FIXME: Remove in Akka 3.0
+    public static final HttpOriginRange ALL = akka.http.scaladsl.model.headers.HttpOriginRange.$times$.MODULE$;
 }
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/headers/HttpOriginRanges.java b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/HttpOriginRanges.java
new file mode 100644
index 0000000000..a397d5eaf4
--- /dev/null
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/HttpOriginRanges.java
@@ -0,0 +1,11 @@
+/*
+ * Copyright (C) 2009-2016 Lightbend Inc. <http://www.lightbend.com>
+ */
+
+package akka.http.javadsl.model.headers;
+
+public final class HttpOriginRanges {
+    private HttpOriginRanges() { }
+
+    public static final HttpOriginRange ALL = akka.http.scaladsl.model.headers.HttpOriginRange.$times$.MODULE$;
+}
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/headers/LanguageRange.java b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/LanguageRange.java
index 067e37f1eb..9c1491c963 100644
--- a/akka-http-core/src/main/java/akka/http/javadsl/model/headers/LanguageRange.java
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/LanguageRange.java
@@ -11,5 +11,12 @@ public interface LanguageRange {
     public abstract Iterable<String> getSubTags();
     public abstract LanguageRange withQValue(float qValue);
 
+    /**
+     * @deprecated because of troublesome initialisation order (with regards to scaladsl class implementing this class).
+     *             In some edge cases this field could end up containing a null value.
+     *             Will be removed in Akka 3.x, use {@link LanguageRanges#ALL} instead.
+     */
+    @Deprecated
+    // FIXME: Remove in Akka 3.0
     public static final LanguageRange ALL = akka.http.scaladsl.model.headers.LanguageRange.$times$.MODULE$;
 }
diff --git a/akka-http-core/src/main/java/akka/http/javadsl/model/headers/LanguageRanges.java b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/LanguageRanges.java
new file mode 100644
index 0000000000..963852ac58
--- /dev/null
+++ b/akka-http-core/src/main/java/akka/http/javadsl/model/headers/LanguageRanges.java
@@ -0,0 +1,11 @@
+/*
+ * Copyright (C) 2009-2016 Lightbend Inc. <http://www.lightbend.com>
+ */
+
+package akka.http.javadsl.model.headers;
+
+public class LanguageRanges {
+    private LanguageRanges() { }
+
+    public static final LanguageRange ALL = akka.http.scaladsl.model.headers.LanguageRange.$times$.MODULE$;
+}
diff --git a/akka-http-core/src/main/scala/akka/http/javadsl/model/ContentType.scala b/akka-http-core/src/main/scala/akka/http/javadsl/model/ContentType.scala
index bf47deccc1..33de494cdc 100644
--- a/akka-http-core/src/main/scala/akka/http/javadsl/model/ContentType.scala
+++ b/akka-http-core/src/main/scala/akka/http/javadsl/model/ContentType.scala
@@ -7,6 +7,8 @@ import java.util.Optional
 
 /**
  * Represents an Http content-type. A content-type consists of a media-type and an optional charset.
+ *
+ * See [[ContentTypes]] for convenience access to often used values.
  */
 // Has to be defined in Scala even though it's JavaDSL because of:
 // https://issues.scala-lang.org/browse/SI-9621
diff --git a/akka-http-core/src/main/scala/akka/http/javadsl/model/MediaType.scala b/akka-http-core/src/main/scala/akka/http/javadsl/model/MediaType.scala
index 1b6a67dc63..d22ed2e85a 100644
--- a/akka-http-core/src/main/scala/akka/http/javadsl/model/MediaType.scala
+++ b/akka-http-core/src/main/scala/akka/http/javadsl/model/MediaType.scala
@@ -6,6 +6,7 @@ package akka.http.javadsl.model
 /**
  * Represents an Http media-type. A media-type consists of a main-type and a sub-type.
  *
+ * See [[MediaTypes]] for convenience access to often used values.
  */
 // Has to be defined in Scala even though it's JavaDSL because of:
 // https://issues.scala-lang.org/browse/SI-9621