Minor grammar fixes in dbus-interfaces.md

Change-Id: I74b2a5ac4078f1a9ae96778fe56f593b8e00bca9
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/dbus-interfaces.md b/dbus-interfaces.md
index 315781f..e5f30ae 100644
--- a/dbus-interfaces.md
+++ b/dbus-interfaces.md
@@ -1,7 +1,7 @@
 OpenBMC DBUS API
 ================
 
-Please **note** that the v1.99.xx and greater code now has all of it's
+Please **note** that the v1.99.xx and greater code now has all of its
 interfaces defined in [this](https://github.com/openbmc/phosphor-dbus-interfaces)
 repository.  The below information in this document is for all v1.0.xx code.
 
@@ -12,12 +12,12 @@
 applications are possible by implementing parts of this DBUS API.
 
 OpenBMC typically adheres to DBUS best practices and usage models; however, one
-deviation is that OpenBMC places no requirements on well known service names.
+deviation is that OpenBMC places no requirements on well-known service names.
 This allows developers to structure their object implementations in whatever
 processes they choose.  In the standard DBUS programming model, applications
-connect to a service with a well known name.  The well known name is
+connect to a service with a well-known name.  The well-known name is
 associated with a fixed schema.  In OpenBMC, without any standardization of
-well known names, applications lose the knowledge of what applications provide
+well-known names, applications lose the knowledge of what applications provide
 which objects.  To address this, the Phosphor distribution provides the
 objectmapper service.  See the `org.openbmc.objectmapper.ObjectMapper`
 interface below for more information.
@@ -64,7 +64,7 @@
 `org.openbmc.HostServices`
 ------------------------
 The HostServices interface allows applications to interact with the host
-processor firmware.  Applications should use the high level APIs provided here
+processor firmware.  Applications should use the high-level APIs provided here
 in favor of `org.openbmc.HostIpmi` where applicable.
 
 ### methods
@@ -682,7 +682,7 @@
 `org.openbmc.Watchdog`
 ----------------------
 The Watchdog interface enables health monitoring applications to offload timer
-bookeeping to another application.
+bookkeeping to another application.
 
 ### methods
 | name    | in signature | out signature | description                    |