  We report on baryon resonance production and decay in proton-proton
collisions at a kinetic energy of $3.5$ GeV based on data measured with HADES.
The exclusive channels $pp \rightarrow np\pi^{+}$ and $pp \rightarrow
pp\pi^{0}$ as well as $pp \rightarrow ppe^{+}e^{-}$ are studied simultaneously
for the first time. The invariant masses and angular distributions of the
pion-nucleon systems were studied and compared to simulations based on a
resonance model ansatz assuming saturation of the pion production by an
incoherent sum of baryonic resonances (R) with masses $<2~$ GeV/$c^2$. A very
good description of the one-pion production is achieved allowing for an
estimate of individual baryon-resonance production-cross-sections which are
used as input to calculate the dielectron yields from $R\rightarrow pe^+e^-$
decays. Two models of the resonance decays into dielectrons are examined
assuming a point-like $RN \gamma^*$ coupling and the dominance of the $\rho$
meson. The results of model calculations are compared to data from the
exclusive $ppe^{+}e^{-}$ channel by means of the dielectron and $pe^+e^-$
invariant mass distributions.
