APEXMALHAR-2500 Fix javadoc for FSInputModule

The javadoc stated that FSInputModule is an abstract class, which it is
not. This commit fixes the JavaDoc
diff --git a/library/src/main/java/com/datatorrent/lib/io/fs/FSInputModule.java b/library/src/main/java/com/datatorrent/lib/io/fs/FSInputModule.java
index d4edb40..34c58d2 100644
--- a/library/src/main/java/com/datatorrent/lib/io/fs/FSInputModule.java
+++ b/library/src/main/java/com/datatorrent/lib/io/fs/FSInputModule.java
@@ -33,7 +33,7 @@
 import com.datatorrent.netlet.util.Slice;
 
 /**
- * FSInputModule is an abstract class used to read files from file systems like HDFS, NFS, S3, etc. <br/>
+ * FSInputModule is a class used to read files from file systems like HDFS, NFS, S3, etc. <br/>
  * FSInputModule emits FileMetadata, BlockMetadata, BlockBytes. <br/>
  * The module reads data in parallel, following parameters can be configured<br/>
  * 1. files: list of file(s)/directories to read<br/>