add CheckReturnValue annotation in org.slf4j.helpers

Signed-off-by: Ceki Gulcu <ceki@qos.ch>

slf4j-api/pom.xml

@@ -22,16 +22,6 @@
     <module-name>org.slf4j</module-name>
   </properties>
 
-  <dependencies>
-    <dependency>
-      <groupId>com.google.code.findbugs</groupId>
-      <artifactId>jsr305</artifactId>
-      <version>3.0.2</version>
-      <optional>true</optional>
-    </dependency>
-  </dependencies>
-
-
   <build>
     <plugins>
       <plugin>

slf4j-api/src/main/java/org/slf4j/helpers/CheckReturnValue.java

@@ -0,0 +1,23 @@
+package org.slf4j.helpers;
+
+
+import org.slf4j.Marker;
+
+import java.lang.annotation.*;
+
+/**
+ * <p>Used to annotate methods in the {@link org.slf4j.spi.LoggingEventBuilder} interface
+ * which return an instance of LoggingEventBuilder (usually as <code>this</code>). Such
+ * methods should be followed by one of the terminating <code>log()</code> methods returning
+ * <code>void</code>.</p>
+ *
+ * <p>Some IDEs such as IntelliJ IDEA support this annotation at compile time.</p>
+ *
+ * @author Ceki G&uuml;lc&uuml;
+ * @since 2.0.0-beta1
+ */
+@Documented
+@Target( { ElementType.METHOD })
+@Retention(RetentionPolicy.RUNTIME)
+public @interface CheckReturnValue {
+}

slf4j-api/src/main/java/org/slf4j/spi/LoggingEventBuilder.java

@@ -28,7 +28,7 @@ import java.util.function.Supplier;
 
 import org.slf4j.Marker;
 
-import javax.annotation.CheckReturnValue;
+import org.slf4j.helpers.CheckReturnValue;
 
 /**
  * This is the main interface in slf4j's fluent API for creating